GK Questions and Answers on Lenses and Mirrors

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  • Q1. In the case of a concave mirror, the image of an object is

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  • Q2. To increase the magnifying power of a telescope, the focal length of

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  • Q3. Why the colour of the ocean appears blue?

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  • Q4. What is the power of concave lens?

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  • Q5. Which glasses or lens are used to correct the short sighted eye defect?

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  • Q6. In projectors which lenses are used?

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  • Q7. Due to which phenomena the stick if immersed in water appears to be bent?

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  • Q8. Due to which phenomena light rays emerging from a cinema machine spread wide on the screen?

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  • Q9. Dental mirror is what type of a mirror?

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  • Q10. What type of a mirror is used in anti-shop-lifting-devices?

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GK Questions and Answers on Lenses and Mirrors

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