Light Test

Result

Light Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Cylindrical lenses are used to cure

A
long-sightedness

B
astigmatism

C
myopia

D
presbyopia
Question 2
1 / -0

A transparent spherical structure that refracts light into the eye is called

A
pupil

B
retina

C
iris

D
cornea

Solution

The cornea is the transparent spherical structure that refracts light into the eye. It is a highly organised tissue. It contains no blood vessels to nourish or protect it against infection.
Question 3
1 / -0

The opening in the eye that regulates the amount of light entering the eye is called

A
iris

B
pupil

C
cornea

D
retina

Solution

Iris controls the amount of light entering the eye ball. It is the coloured part of the eye. It has a hole at its centre, called the pupil. Iris is responsible for changing the size of pupil according to the light conditions.
Question 4
1 / -0

The principle of persistence of vision forms the basis of working of

A
camera

B
cinema

C
spectroscope

D
periscope
Question 5
1 / -0

Which of the following is the relation between focal length (f) and radius of curvature (R)?

A
R = f/2

B
R = 2f

C
R = f

D
None of these
Question 6
1 / -0

The least distance of distinct vision for a normal vision is about

A
25 cm

B
2.5 cm

C
25 m

D
2.5 m
Question 7
1 / -0

The relative refractive index of medium B with respect to medium A is 9/8. If the speed of light in the medium B is 2 × 10⁸, the speed of light in the medium A

A
10⁸ m/s

B
1.5 × 10⁸ m/s

C
2 × 10⁸ m/s

D
2.25 × 10⁸ m/s
Question 8
1 / -0

The absolute refractive index is the

A
ratio compared with the refractive index of water

B
ratio compared with the refractive index of glass

C
ratio compared with the refractive index of benzene

D
ratio compared with the refractive index of vacuum

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Re-Attempt Weekly Quiz Competition

Light Test - 3

Result

Light Test - 3

Score

-

Rank

-

SHARING IS CARING

Question 1

long-sightedness

astigmatism

myopia

presbyopia

Question 2

pupil

retina

iris

cornea

Solution

Question 3

iris

pupil

cornea

retina

Solution

Question 4

camera

cinema

spectroscope

periscope

Question 5

R = f/2

R = 2f

R = f

None of these

Question 6

25 cm

2.5 cm

25 m

2.5 m

Question 7

108 m/s

1.5 × 108 m/s

2 × 108 m/s

2.25 × 108 m/s

Question 8

ratio compared with the refractive index of water

ratio compared with the refractive index of glass

ratio compared with the refractive index of benzene

ratio compared with the refractive index of vacuum

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

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10⁸ m/s

1.5 × 10⁸ m/s

2 × 10⁸ m/s

2.25 × 10⁸ m/s