# Physics-Light (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 8 - 13 of 31

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## Question number: 8

» Physics » Light

MCQ▾

### Question

An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is

### Choices

Choice (4) Response

a.

15 cm

b.

30 cm

c.

20 cm

d.

45 cm

## Question number: 9

» Physics » Light

MCQ▾

### Question

Two thin lenses of focal lengths f 1 and f 2 are placed in contact. The focal length of the composite lenses will be

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 10

» Physics » Light

MCQ▾

### Question

Figure shows when the as shown two rays A and B being reflected by a mirror and going as A’ and B’. The mirror is

### Choices

Choice (4) Response

a.

may be any spherical mirror

b.

is plane

c.

is concave

d.

is convex

## Question number: 11

» Physics » Light

MCQ▾

### Question

Image is formed for the short sighted person at

### Choices

Choice (4) Response

a.

image is not formed at all

b.

behind the retina

c.

retina

d.

before retina

## Question number: 12

» Physics » Light

MCQ▾

### Question

The image formed on the retina of a human eye is

### Choices

Choice (4) Response

a.

virtual and erect

b.

real and inverted

c.

virtual and inverted

d.

real and erect

## Question number: 13

» Physics » Light

MCQ▾

### Question

When the power of eye lens increases, the defect of vision is produced. The defect is known as

### Choices

Choice (4) Response

a.

color blindness

b.

short sightedness

c.

long sightedness

d.

All of the above

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