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 | |
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 | |
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 | |
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 | |
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 | |
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 | |