Physics-Light (NSTSE (National Science Talent Search Exam- Unified Council) Class 8): Questions 1 - 7 of 30

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Question number: 1

» Physics » Light

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Question

Which of the following mirrors are used in periscopes?

Choices

Choice (4) Response

a.

Plane mirrors

b.

Plano – convex mirrors

c.

Convex mirrors

d.

Concave mirrors

Question number: 2

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Question

When two plane mirrors are placed perpendicular to each other, the number of multiple images formed by them is:

Choices

Choice (4) Response

a.

b.

3

c.

4

d.

0

Question number: 3

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Question

If angle between two plane mirrors is , and object is placed between these two mirrors, then number of multiple images formed by these two mirror is,

Choices

Choice (4) Response

a.

3600

b.

35

c.

36

d.

26

Question number: 4

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Question

We can see an object, because

Choices

Choice (4) Response

a.

reflects light by object falls on our eyes

b.

our eyes projected light on object

c.

falls light on object, reflected by eyes

d.

All of the above

Question number: 5

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MCQ▾

Question

The propagation of light is,

Choices

Choice (4) Response

a.

Either planar or rectilinear propagation

b.

Cubic propagation

c.

Planar propagation

d.

Rectilinear propagation

Passage

See the following diagram of human eye, and answer the questions given below it.

Diagram of human eye

Diagram of Human Eye

In figure, diagram of human eye is shown.

Question number: 6 (1 of 3 Based on Passage) Show Passage

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MCQ▾

Question

The letters and represent, respectively:

Choices

Choice (4) Response

a.

Iris, Lens and Cornea

b.

Retina, Cornea and Lens

c.

Retina, Lens and Cornea

d.

Iris, Lens and retina

Question number: 7 (2 of 3 Based on Passage) Show Passage

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Question

What is the function of part of eye represented by , in figure?

Choices

Choice (4) Response

a.

Covers anterior chamber of eye

b.

Controlling the amount of light entering the eye by contracting or dilating

c.

On which image formed

d.

Allows the light to fall on retina

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