Cho S1 và S2 trước gương phẳng
a, xác định vùng nhìn thấy S1
B, Xác định vùng nhìn thấy S2
c, Xác định vùng nhìn thấy 2 điểm
d, Xác định vùng không nhìn thấy ảnh nào
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<p>Chiếu một tia sáng tới lên gương phẳng, biết góc tạo bởi tia tới và tia phản xạ bằng 50°. Góc tạo bởi tia tới vaf mặt gương bằng:</p> </div>
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<p><b>6. </b>Khi nào vạt phát ra âm cao, thấp, to, nhỏ <b><i>(nhớ trình bày rõ ràng nhé các bn yêu dấu!!)<img title="yeu" alt="yeu" width="40" height="40" src="https://hoc247.net/image/faq/data2/665419_145281-udludlah.jpg" /></i></b></p> </div>
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<p><b>5.A. </b>So sánh tính chất ảnh tạo bởi các gương.<br /> <b>B.</b> Nêu và giải thích ứng dụng cuuar các loại gương.<br /> <br /> <b><i>Help milk!mai milk nộp rồi!!!!!!!!!!!!<img title="khocroi" alt="khocroi" width="40" height="40" src="https://hoc247.net/image/faq/data2/18518_921932-." /></i></b></p> </div>
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<p class="cred fs12">Lưu ý: Các trường hợp cố tình spam câu trả lời hoặc bị báo xấu trên 5 lần sẽ bị khóa tài khoản</p>
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<span class="datepost">Cách đây 6 năm</span>
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<h3 class="i-title"><a href="https://hoc247.net/hoi-dap/vat-ly-7/dinh-luat-phan-xa-anh-sang-la-gi--faq162578.html">Định luật phản xạ ánh sáng là gì ?</a></h3>
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<p>Định luật phản xạ 1sk</p> </div>
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<span class="datepost" data="2018-10-18 15:36:40"> <i class="fa fa-calendar"></i> 18/10/2018 | <a href="https://hoc247.net/hoi-dap/vat-ly-7/dinh-luat-phan-xa-anh-sang-la-gi--faq162578.html"><i class="fa fa-comments-o" aria-hidden="true"></i> 1 Trả lời</a>
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<p class="cred fs12">Lưu ý: Các trường hợp cố tình spam câu trả lời hoặc bị báo xấu trên 5 lần sẽ bị khóa tài khoản</p>
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<h3 class="i-title"><a href="https://hoc247.net/hoi-dap/vat-ly-7/ve-tia-toi-va-tia-phan-xa-khi-chieu-1-tia-sang-len-guong-phang-voi-goc-toi-30-do--faq160572.html">Vẽ tia tới và tia phản xạ khi chiếu 1 tia sáng lên gương phẳng với góc tới 30 độ ?</a></h3>
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<p>chiếu 1 tia sáng lên gương phẳng với góc tới 30 độ .Vẽ tia tới và tia phản xạ .Tính góc phản xạ <img alt="lolang" height="40" src="https://hoc247.net/image/faq/data2/300598_992783-lolang.png" title="lolang" width="40" /></p> </div>
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<span class="datepost" data="2018-10-18 15:32:42"> <i class="fa fa-calendar"></i> 18/10/2018 | <a href="https://hoc247.net/hoi-dap/vat-ly-7/ve-tia-toi-va-tia-phan-xa-khi-chieu-1-tia-sang-len-guong-phang-voi-goc-toi-30-do--faq160572.html"><i class="fa fa-comments-o" aria-hidden="true"></i> 1 Trả lời</a>
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<p class="cred fs12">Lưu ý: Các trường hợp cố tình spam câu trả lời hoặc bị báo xấu trên 5 lần sẽ bị khóa tài khoản</p>
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<h3>XEM NHANH CHƯƠNG TRÌNH LỚP 7</h3>
<div class="134 col-md-9 hidden-xs">
<div class="col-md-4">
<h4 class="153">Toán 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/toan-hoc/?sgk=1">Toán 7 Kết Nối Tri Thức</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/toan-hoc/?sgk=3">Toán 7 Chân Trời Sáng Tạo</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/toan-hoc/?sgk=2">Toán 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-toan-7-ket-noi-tri-thuc-index.html">Giải bài tập Toán 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-toan-7-chan-troi-sang-tao-index.html">Giải bài tập Toán 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-toan-7-canh-dieu-index.html">Giải bài tập Toán 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-toan-7-index.html">Trắc nghiệm Toán 7</a></p>
</div>
<div class="col-md-4">
<h4 class="153">Ngữ văn 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/ngu-van/?sgk=1">Ngữ Văn 7 Kết Nối Tri Thức</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/ngu-van/?sgk=3">Ngữ Văn 7 Chân Trời Sáng Tạo</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/ngu-van/?sgk=2">Ngữ Văn 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/soan-van-7-ket-noi-tri-thuc-index.html">Soạn Văn 7 Kết Nối Tri Thức</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/soan-van-7-chan-troi-sang-tao-index.html">Soạn Văn 7 Chân Trời Sáng Tạo</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/soan-van-7-canh-dieu-index.html">Soạn Văn 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/van-mau-lop-7-index.html">Văn mẫu 7</a></p>
</div>
<div class="col-md-4">
<h4 class="153">Tiếng Anh 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/tieng-anh/?sgk=1">Tiếng Anh 7 Kết Nối Tri Thức</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/tieng-anh/?sgk=3">Tiếng Anh 7 Chân Trời Sáng Tạo</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/tieng-anh/?sgk=2">Tiếng Anh 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-tieng-anh-7-ket-noi-tri-thuc-index.html">Trắc nghiệm Tiếng Anh 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-tieng-anh-7-chan-troi-sang-tao-index.html">Trắc nghiệm Tiếng Anh 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-tieng-anh-7-canh-dieu-index.html">Trắc nghiệm Tiếng Anh 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-tieng-anh-7-index.html">Giải Sách bài tập Tiếng Anh 7</a></p>
</div>
<div class="col-md-4">
<h4 class="153">Khoa học tự nhiên 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/khoa-hoc-tu-nhien/?sgk=1">Khoa học tự nhiên 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/khoa-hoc-tu-nhien/?sgk=3">Khoa học tự nhiên 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/khoa-hoc-tu-nhien/?sgk=2">Khoa học tự nhiên 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-khoa-hoc-tu-nhien-7-ket-noi-tri-thuc-index.html">Giải bài tập KHTN 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-khoa-hoc-tu-nhien-7-chan-troi-sang-tao-index.html">Giải bài tập KHTN 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-khoa-hoc-tu-nhien-7-canh-dieu-index.html">Giải bài tập KHTN 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-khoa-hoc-tu-nhien-7-index.html">Trắc nghiệm Khoa học tự nhiên 7</a></p>
</div>
<div class="col-md-4">
<h4 class="153">Lịch sử và Địa lý 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/lich-su-va-dia-li/?sgk=1">Lịch sử & Địa lí 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/lich-su-va-dia-li/?sgk=3">Lịch sử & Địa lí 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/lich-su-va-dia-li/?sgk=2">Lịch sử & Địa lí 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-lich-su-va-dia-li-7-ket-noi-tri-thuc-index.html">Giải bài tập LS và ĐL 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-lich-su-va-dia-li-7-chan-troi-sang-tao-index.html">Giải bài tập LS và ĐL 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-lich-su-va-dia-li-7-canh-dieu-index.html">Giải bài tập LS và ĐL 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-lich-su-va-dia-li-7-index.html">Trắc nghiệm Lịch sử và Địa lí 7</a></p>
<p> </p>
</div>
<div class="col-md-4">
<h4 class="153">GDCD 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/gdcd/?sgk=1">GDCD 7 Kết Nối Tri Thức</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/gdcd/?sgk=3">GDCD 7 Chân Trời Sáng Tạo</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/gdcd/?sgk=2">GDCD 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-gdcd-7-ket-noi-tri-thuc-index.html">Giải bài tập GDCD 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-gdcd-7-chan-troi-sang-tao-index.html">Giải bài tập GDCD 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-gdcd-7-canh-dieu-index.html">Giải bài tập GDCD 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-gdcd-7-index.html">Trắc nghiệm GDCD 7</a></p>
<p> </p>
</div>
<div class="col-md-4">
<h4 class="153">Công nghệ 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/cong-nghe/?sgk=1">Công nghệ 7 Kết Nối Tri Thức</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/cong-nghe/?sgk=3">Công nghệ 7 Chân Trời Sáng Tạo</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/cong-nghe/?sgk=2">Công nghệ 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-cong-nghe-7-ket-noi-tri-thuc-index.html">Giải bài tập Công nghệ 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-cong-nghe-7-chan-troi-sang-tao-index.html">Giải bài tập Công nghệ 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-cong-nghe-7-canh-dieu-index.html">Giải bài tập Công nghệ 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-cong-nghe-7-index.html">Trắc nghiệm Công nghệ 7</a></p>
</div>
<div class="col-md-4">
<h4 class="153">Tin học 7</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/tin-hoc/?sgk=1">Tin học 7 Kết Nối Tri Thức</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/tin-hoc/?sgk=3">Tin học 7 Chân Trời Sáng Tạo</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/chuong-trinh/lop-7/tin-hoc/?sgk=2">Tin học 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-tin-hoc-7-ket-noi-tri-thuc-index.html">Giải bài tập Tin học 7 KNTT</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-tin-hoc-7-chan-troi-sang-tao-index.html">Giải bài tập Tin học 7 CTST</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/giai-bai-tap-tin-hoc-7-canh-dieu-index.html">Giải bài tập Tin học 7 Cánh Diều</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/trac-nghiem-tin-hoc-7-index.html">Trắc nghiệm Tin học 7</a></p>
</div>
<div class="col-md-4">
<h4 class="153">Cộng đồng</h4>
<p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/hoi-dap/lop-7/toan-hoc/">Hỏi đáp lớp 7</a></p> <p data="188 2025-01-08/date1=2025-01-01/date2=2025-12-31"><a href="https://hoc247.net/tu-lieu/lop-7/">Tư liệu lớp 7</a></p>
</div>
</div>
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<h4>Xem nhiều nhất tuần</h4>
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