Light-Human Eye [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 6 of 9

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Question 1

Question MCQ▾

Staring a computer screen for a long time can:

Choices

Choice (4)Response

a.

Strain your eyes

b.

Use suitable spectacles

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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Question 2

Question MCQ▾

Persistence of vision is defined as:

Choices

Choice (4)Response

a.

Nerve endings which are sensitive to dim light

b.

Nerve endings which are sensitive to bright light

c.

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

d.

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

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Question 3

Question MCQ▾

Most sensitive part of the human eye is:

Choices

Choice (4)Response

a.

Optic nerve fibres

b.

Iris

c.

Eye lens

d.

Cornea

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Question 4

Question MCQ▾

Insufficient light causes

Choices

Choice (4)Response

a.

Eye dis order

b.

Eyestrain

c.

Headache

d.

Question does not provide sufficient data or is vague

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Question 5

Question MCQ▾

The essential parts of the eye are:

Choices

Choice (4)Response

a.

Eye lens, Retina, Rods and cones

b.

Cornea, Iris, Retina, Rods and cones

c.

Blind spot

d.

All of the above

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Question 6

Question MCQ▾

Size of the Pupil varies with the help of:

Choices

Choice (4)Response

a.

Ciliary muscles

b.

Iris

c.

Retina

d.

Cornea

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