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		<h1>Bài tập về thấu kính phân kỳ</h1>
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			<li>Thứ tư - 10/02/2021 09:39</li>
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			BÀI TẬP 1: Một vật sáng AB có dạng mũi tên cao 6cm đặt vuông góc trục chính của thấu kính phân kỳ, cách thấu kính 10cm. Thấu kính có tiêu cự 15 cm.<br />a/ Dựng ảnh của vật qua thấu kính<br />b/ Xác định kích thước và vị trí của ảnh
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI TẬP 2:</b> Một vật sáng AB có dạng mũi tên đặt vuông góc trục chính của thấu kính phân kỳ, cho ảnh cao 3,6 cm và cách thấu kính 6cm. Thấu kính có tiêu cự 15 cm.</span></span><br  />
a.&nbsp;<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Xác định kích thư<br  />
b. và vị trí của ảnh</span></span><br  />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt">Bài tập 3:</span></b><b> </b><span style="font-size:14.0pt">&nbsp;Một chùm sáng song song&nbsp; có đường kính D = 5cm được chiếu tới thấu kính phân kì O<sub>1</sub> sao cho tia trung tâm của chùm sáng trùng với trục chính của thấu kính. Sau khi khúc xạ qua thấu kính này cho một hình tròn sáng có đường kính D<sub>1 </sub>=7cm trên màn chắn E&nbsp; đặt vuông góc với trục chính và cách <i>thấu kính phân kì</i> một khoảng là <i>l</i>.</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a/ Nếu thay <i>thấu kính phân kì</i> bằng <i>thấu kính hội tụ</i> O<sub>2</sub> có cùng tiêu cự và nằm ngay vị trí của <i>thấu kính phân kì</i> thì trên màn chắn E thu được hình tròn sáng có đường kính là bao nhiêu?</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b/ Cho <i>l </i>=24cm. Tính tiêu cự của <i>thấu kính hội tụ</i>.</span></span></span><br  />
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