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NUST Entrance Test
Physics
Optical Instruments

Set 1

Mashaal Masha

Oct 15, 2022

0

Table of Contents

$The least distance of distinct vision is:$
$With age, least distance of distinct vision:$
$The distance from eye to near point is taken as:$
$A convex lens acts as diverging lens when the object is placed:$
$When the object lies between F and 2F, the image formed by a convex lens is:$
$If the object is situated at focus of a convex lens, then its image is formed at:$
$How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:$
$If the focal length of a convex lens is 5 cm, then to get real and inverted image of the same size as that of object, the object should be placed at:$
$The ratio of the diameters of two convex lenses is ______ the ratio of their focal lengths$
$Least distance of distinct vision of an old man possibly becomes:$

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Choose the correct options for the following questions.

The least distance of distinct vision is:

Difficulty: Easy

Bookmark

A:

10 cm

B:

25 cm

C:

50 cm

D:

100 cm

With age, least distance of distinct vision:

Difficulty: Easy

Bookmark

A:

Increases

B:

Decreases

C:

Is not affected

D:

None