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Nda physics quiz optics

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Question 1.






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Question 2. Two thin convex lenses of focal lengths 4cm and 8cm are separated by a distance of 4cm in air, the combination will have the focal length






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Question 3.







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Question 4. A refracting telescope consists of






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Question 5. The mirror used for the head light of a car is






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Question 6. Yellow color light is used as fog light because yellow color






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Question 7. The human eye is like a camera and hence it contains a system of lens. The eye lens forms







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Question 8. An object is placed at the focus of a concave mirror. The image will be






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Question 9. The spread in colors in a rainbow on sky is primarily due to






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Question 10. A beautiful rainbow on the sky is due to the






 

 
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