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Only one of the following applies to a c...

Only one of the following applies to a concave lens. This is:

A

a focal length is positive

B

image distance can be positive or negative

C

height of image can be positive or negative

D

image distance is always negative.

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Verified by Experts

The correct Answer is:
C
d)
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LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. a) A small object is placed 150 mm away from a diverging lens of focal...

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  2. A concave lens produces an image 20 cm from the lens of an object plac...

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  3. Only one of the following applies to a concave lens. This is:

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  4. The magnification produced by a spherical lens and a spherical mirror ...

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  5. An object is 2m from a lens which forms an erect image one-fourth (exa...

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  6. An image formed on a screen is three times the size of the object. The...

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  7. The lens A has a focal length of 25 cm whereas another lens B has a fo...

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  8. Which causes more bending (or more refraction) of light rays passing t...

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  9. Name the physical quantity whose limit unit is dioptre.

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  10. Define one dioptre of power of a lens.

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  11. Which type of lens has a) a positive power, and b) a negative power?

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  12. Which of the two has a greater power, a lens of short length or a lens...

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  13. How is the power of a lens related to its focal length?

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  14. Which has more power, a thick concave lens or a thin convex lens, made...

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  15. The focal length of a convex lens is 25 cm. What is its power?

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  16. What is the power of a convex lens of focal length 0.5 m?

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  17. A converging lens has a focal length of 50mm. What is the power of the...

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  18. What is the power of a convex lens whose focal length is 80 cm?

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  19. The power of a lens is +0.2D. Calculate its focal length.

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  20. The power of lens is, -2D. Calculate its focal length.

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