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10th CBSE
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Which of the following can make a parallel beam of light when light from a bulb falls on it?

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Important Questions on Refraction of Light

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10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Multiple Choice Questions (MCQs)>Q 41
In order to obtain a real image twice the size of the object with a convex lens of focal length 15 cm, the object distance should be:
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10th CBSE
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Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Multiple Choice Questions (MCQs)>Q 42
A converging lens is used to produce an image of an object on a screen. What change is needed for the image to be formed nearer to the lens?
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10th CBSE
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Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Multiple Choice Questions (MCQs)>Q 43
A convex lens of focal length 8 cm forms a real image of the same size as the object. The distance between the object and its image will be:
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10th CBSE
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Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Multiple Choice Questions (MCQs)>Q 44
A virtual, erect and magnified image of an object is to be obtained with a convex lens. For this purpose, the object should be placed:
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10th CBSE
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Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Multiple Choice Questions (MCQs)>Q 45
A burning candle whose flame is 1.5 cm tall is placed at a certain distance in front of a convex lens. An image of candle flame is received on a white screen kept behind the lens. The image of flame also measures 1.5 cm. If f is the focal length of convex lens, the candle is placed:
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10th CBSE
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Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Questions Based on High Order Thinking Skills (HOTS)>Q 46
A lens of focal length 12 cm forms an erect image three times the size of the object. The distance between the object and image is:
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10th CBSE
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Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Questions Based on High Order Thinking Skills (HOTS)>Q 47
If an object is placed 21 cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed 19 cm from the lens, the image formed is slightly larger than the object. The approximate focal length of the lens is:
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10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 5 - Refraction of Light>Questions Based on High Order Thinking Skills (HOTS)>Q 48

An object is placed at the following distances from a convex lens of focal length 15 cm: Which position of the object will produce a magnified real image?