Question

A boy was unable to see the black board in the school from the last bench and doctor prescribed a lens with power of 2D predict the diseases and nature of lens​

Answer 1

Answer:

myopia and concave lens

Explanation:

power = 1/focal length

so f=1/2 in m

f=0.5m

so the focal length of the concave lens is -0.5m

Answer 2

Answer:

The boy who can't see written on the board is suffering from Myopia. Due to the high converging power of the eye lens. ... Because concave lens reduces the high converfing power of lens because it is a diverging lens . By using yhe concave lens the image is form on the Retina

Explanation:

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