Mashaal Masha
Mashaal Masha
 Oct 15, 2022
0
Choose the correct options for the following questions.
The least distance of distinct vision is:
Difficulty: Easy
A:
10 cm
B:
25 cm
C:
50 cm
D:
100 cm
With age, least distance of distinct vision:
Difficulty: Easy
A:
Increases
B:
Decreases
C:
Is not affected
D:
None
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The distance from eye to near point is taken as:
Difficulty: Easy
A:
10 cm
B:
15 cm
C:
20 cm
D:
25 cm
A convex lens acts as diverging lens when the object is placed:
Difficulty: Easy
A:
Between F and 2F
B:
At 2F
C:
With focal length
D:
Beyond 2F
When the object lies between F and 2F, the image formed by a convex lens is:
Difficulty: Easy
A:
Real
B:
Virtual
C:
Diminished
D:
Erect
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If the object is situated at focus of a convex lens, then its image is formed at:
Difficulty: Easy
A:
F
B:
2F
C:
Infinity
D:
None
How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
Difficulty: Easy
A:
The upper half of the image is cut off
B:
The brightness of the image is reduced
C:
The brightness of the image is increased
D:
No effect at all
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:
Difficulty: Easy
A:
5 cm
B:
10 cm
C:
15 cm
D:
20 cm
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The ratio of the diameters of two convex lenses is ______ the ratio of their focal lengths
Difficulty: Easy
A:
greater than
B:
lesser than
C:
equal to
D:
none
Least distance of distinct vision of an old man possibly becomes:
Difficulty: Easy
A:
A little less than 25 cm
B:
A little more than 25 cm
C:
Much less than 25 cm
D:
None

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