Lakhmir Singh and Manjit Kaur Solutions for Chapter: The Human Eye and The Colourful World, Exercise 2: Short Answer Type Questions

Why is a normal eye not able to see clearly the objects placed closer than $25 \mathrm{cm}$?

What changes take place in the shape of eye-lens when the eye is focused on a near objects?

What changes take place in the shape of eye-lens when the eye is focused on a distant objects?

The eyes of a person are focused (i) on a nearby object and (ii) on a distant object, turn by turn. In which case the focal length of eye-lens will be the maximum?

The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case the converging power of eye-lens will be the maximum?

List, in order, the parts of the eye through which light passes to reach the retina.

What happens to the size of the pupil of our eye (i) in dim light (ii) in bright light?

Name the cells on the retina of an eye which are sensitive to (i) bright light (ii) dim light (iii) sensation of colour.