Light-Human Eye (CBSE Class-8 Science): Questions 1 - 7 of 9

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Question number: 1

» Light » Human Eye » Care of Eyes

MCQ▾

Question

Staring a computer screen for a long time can:

Choices

Choice (4) Response

a.

Use suitable spectacles

b.

Strain your eyes

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 2

» Light » Human Eye » Functioning of Human Eye

MCQ▾

Question

Persistence of vision is defined as:

Choices

Choice (4) Response

a.

Ability of the eye to change the focal length of the eye lens

b.

Nerve endings which are sensitive to bright light

c.

Nerve endings which are sensitive to dim light

d.

Ability of an eye to continue to see an image for a short duration evenafter the removal of the object

Question number: 3

» Light » Human Eye » Structure of Human Eye

MCQ▾

Question

Most sensitive part of the human eye is:

Choices

Choice (4) Response

a.

Iris

b.

Cornea

c.

Optic nerve fibres

d.

Eye lens

Question number: 4

» Light » Human Eye » Care of Eyes

MCQ▾

Question

Insufficient light causes

Choices

Choice (4) Response

a.

Eye dis order

b.

Headache

c.

Eyestrain

d.

All of the above

Question number: 5

» Light » Human Eye » Structure of Human Eye

MCQ▾

Question

The essential parts of the eye are:

Choices

Choice (4) Response

a.

Eye lens, Retina, Rods and cones

b.

Blind spot

c.

Cornea, Iris, Retina, Rods and cones

d.

Question does not provide sufficient data or is vague

Question number: 6

» Light » Human Eye » Structure of Human Eye

MCQ▾

Question

Size of the Pupil varies with the help of:

Choices

Choice (4) Response

a.

Retina

b.

Cornea

c.

Ciliary muscles

d.

Iris

Question number: 7

» Light » Human Eye » Care of Eyes

MCQ▾

Question

You can cure for your eye by putting on protective eyewear whenever

Choices

Choice (4) Response

a.

You play sports

b.

When you are doing projects in the science labs

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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