# Physics Quiz: Light And Optics

15 Questions | Total Attempts: 13284  Settings  Hello and welcome to this ultimate 'Physics Quiz: Light and Optics' that we've created below for you. This quiz will test your knowledge about light and its related concepts. Let's see if you can crack this quiz or not. The questions here are multiple-choice based and you just have to do is choose the correct answer to every question. Do you think you think you'll be able to pass this test? Let's start the quiz and find out.

• 1.
The critical angle for diamond (n = 2.42) submerged in water (n = 1.33) is:
• A.

33°

• B.

49°

• C.

24°

• D.

17°

• E.

Does not exist

• 2.
Calculate the index of refraction for an object in which light travels at 1.97 x 108 m/s.
• A.

1.97 m/s

• B.

1.52 m/s

• C.

1.95

• D.

1.52

• 3.
The critical angle of zircon is 31°. Which of the following incident angles would result in total internal reflection?
• A.

17°

• B.

34°

• C.

A and C

• D.

B and C

• 4.
When a light ray traveling in glass is incident on an air surface:
• A.

It will refract away from the normal

• B.

Some of the light may be reflected

• C.

All of the light may be reflected

• D.

All of A, B, and C

• E.

Two of A, B, and C

• 5.
Light travels from medium X into medium Y. Medium Y has a higher index of refraction. Consider each statement below: (i) The light travels faster in X. (ii) The light will bend towards the normal. (iii) The light will speed up. (iv) The light will bend away from the normal.
• A.

(ii)

• B.

(iii) and (iv)

• C.

(i) and (ii)

• D.

(ii), (iii), and (iv)

• 6.
For a converging lens, a light ray that is traveling parallel to the principal axis refracts:
• A.

Through the principal focus

• B.

Through the secondary focus

• C.

Through the optical centre

• D.

Parallel to the principal axis

• 7.
A object is placed between f and 2f for a diverging lens. The image will be located:
• A.

Between f and 2f

• B.

Between the lens and f

• C.

Farther than 2f

• D.

A or B

• 8.
Light that travels into the eye passes through several parts to get to the retina. The correct order is:
• A.

Cornea, vitreous humour, lens, pupil

• B.

Cornea, lens, pupil, vitreous humour

• C.

Pupil, cornea, lens, vitreous humour

• D.

Cornea, pupil, lens, vitreous humour

• 9.
The proper name for the inability to focus in different planes is:
• A.

Hyperopia

• B.

Presbyopia

• C.

Astigmatism

• D.

Myopia

• 10.
The proper name for farsightedness is:
• A.

Hyperopia

• B.

Presbyopia

• C.

Astigmatism

• D.

Glaucoma

• 11.
A block of glass is pushed into the path of the light, as shown below. The point where the light rays cross will:
• A.

Stay in the same place

• B.

Move to the left

• C.

Move to the right

• D.

Shift up

• E.

Shift down

• 12.
The focal length of a converging lens is 15 cm. An object is placed 45 cm away from the lens. The image will be:
• A.

Smaller and real

• B.

Larger and real

• C.

The same size and real

• D.

Smaller and virtual

• E.

Larger and virtual

• 13.
A survivor from a shipwreck sees an image of a fish in the water. To catch it with her spear, she must:
• A.

Aim above the image of the fish

• B.

Aim below the image of the fish

• C.

Aim at the image of the fish

• D.

Aim behind the fish

• 14.
A light ray has an angle of incidence of 34º. The reflected ray will make what angle with the reflecting surface?
• A.

• B.

56º

• C.

66º

• D.

74º

• 15.
The focal length of a diverging lens is 12 cm. An object is placed 5.0 cm away from the lens. The image will be:
• A.

Smaller and real

• B.

Larger and real

• C.

The same size and real

• D.

Smaller and virtual

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