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HUMAN EYE AND COLORFUL WORLD - CLASS 10 - MCQ 1

Quiz
Q1. A student sitting on the last bench can read the letters written on the blackboard but is not able to read / the letters written in his textbook. Which of the following statements is correct?

The near point of his eyes has receded away.

The near point of his eyes has come closer to him.

The far point of his eyes has come closer to him.

The far point of his eyes has receded away.

Q2. When light rays enter the eye, most of the refraction occurs at the

Crystalline lens

Outer surface of the cornea

Iris

Pupil

Q3. Which of the following statement is correct?

A person with myopia can see distant objects clearly.

A person with hypermetropia can see nearby objects clearly.

A person with myopia can see nearby objects clearly.

A person with hypermetropia cannot see distant objects clearly.

Q4. Type of lens used in correction of myopia

Convex lens

Concave lens

Reflecting lens

None of these

Q5. Type of lens used in correction of hypermetropia

Convex lens

Concave lens

Reflecting lens

All of the above

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Q6. Myopia may arise due to

Excessive curvature of the eye lens

Elongation of the eyeball

Both

None of these

Q7. A dark muscular membrane which controls size of pupil

eye

iris

cornea

retina

Q8. Least distance of distinct vision for normal eye is

25 cm

30 cm

28 cm

20 cm

Q9. Farthest point of a normal eye is

100 cm

1 km

1500 km

infinity

Q10. Crystalline lens of people at old age becomes milky and cloudy. This condition is called

myopia

lever

cataract

None of these

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Q11. Bifocal lens is used in

myopia

lever

cataract

Presbyopia

Q12. The black opening between the aqueous humour and the lens is called

retina

iris

cornea

pupil

Q13. Near and far points of a young person normal eye respectively are

0 and infinity

0 and 25 cm

25 cm and infinity

25 cm and 150 cm

Q14. The defect of vision in which the person is able to see distant object distinctly but cannot see nearby objects clearly is called

Long-sightedness

Far-sightedness

Hypermetropia

All of the above

Q15. The ability of eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina is called

Power of observation of the eye

Power of adjustment of the eye

Power of accommodation of the eye

Power of enabling of the eye

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Q16. Myopia and hypermetropia can be corrected by

Concave and plano-convex lens

Concave and convex lens

Convex and concave lens

Plano-concave lens for both defects

Q17. Bi-focal lens are required to correct

astigmatism

coma

myopia

presbyopia

Q18. The image formed on the retina of the human eye is

virtual and inverted

real and inverted

real and erect

virtual and erect

Q19. The change in focal length of human eye is caused due to –

Ciliary muscles

Pupil

Cornea

Iris

Q20. The persistence of vision for human eye is-

1/10th of a sec

1/16th of a sec

1/6th of a sec

none of these


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