Q8 of 284 Page 261

Which has more power : a thick convex lens or a thin convex lens, made of the same glass ? Give reason for your choice.

Thick convex lens has more power as It has shorter focal length


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6

Which of the two has a greater power: a lens of short focal length or a lens of large focal length ?

 7

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

 9

The focal length of a convex lens is 50 cm. What is its power ?

 10

What is the power of a convex lens of focal length 0.25 m ?