Q1 of 52 Page 431

The size of an object as perceived by an eye depends primarily on

The image of an object is formed on the retina. If the image formed on retina is small the size of


the object perceived by an eye will be small and vice – versa.


Actual size of the object and distance of the object from the eye has not are not the primary


Reason for the image perceived by an eye.


Also , aperture of the pupil controls the intensity of light

More from this chapter

All 52 →
11

An object is placed at a distance of 30 cm from a converging lens of focal length 15 cm. A normal eye (near point 25 cm, far point infinity) is placed close to the lens on the other side. (A) Can the eye see the object clearly? (B) What should be the minimum separation between the lens and the eye so that the eye can clearly see the object? (C) Can a diverging lens, placed in contact with the converging lens, help in seeing the object clearly when the eye is close to the lens?

 12

A compound microscope forms an inverted image of an object. In which of the following cases it is likely to create difficulties? (A) Looking at small germs. (B) Looking at circular spots. (C) Looking at a vertical tube containing some water.

 2

The muscles of a normal eye are least strained when the eye is focussed on an object

 3

A normal eye is not able to see objects closer than 25 cm because