Account for the following: a. Part of the human eye that helps in changing the focal length of the eye lens.…
Account for the following:
a. Part of the human eye that helps in changing the focal length of the eye lens.
b. The condition resulting due to the eye lens becoming cloudy.
c. The factors on which colour of the scattered white light depends.
d. The range of vision of a normal eye.
e. The sky appears dark to the astronauts in the space.
Solution
a. Ciliary muscles.
b. Cataract.
c. Size of the suspended particles in the medium through which white, light passes.
d. 25 cm to infinity is the range of vision of normal eye.
e. Due to absence of atmosphere in the space, there is no scattering and hence space appears black/ dark.