Light And Optics Unit Quiz Test
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Take this simple multiple choice questions for light and optics unit and learn more about it!
- 1.A survivor from a ship wreck 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
- E.
Put away the spear and use a fishing rod
- 2.A light ray has an angle of incidence of 34º. The reflected ray will make what angle with the reflecting surface?
- A.
0º
- B.
34º
- C.
56º
- D.
66º
- E.
74º
- 3.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
- 4.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.
0.66 m/s
- C.
1.52 m/s
- D.
1.95
- E.
1.52
- 5.The critical angle of zircon is 31°. Which of the following incident angles would result in total internal reflection?
- A.
17°
- B.
34°
- C.
42°
- D.
A and C
- E.
B and C
- 6.When a light ray travelling 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
- 7.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)
- D.
(i) and (ii)
- E.
(ii), (iii), and (iv)
- 8.For a converging lens, a light ray that is travelling 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
- E.
In line with the principal focus
- 9.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
- E.
There is insufficient information to answer the question.
- 10.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.
Lens, cornea, pupil, vitreous humour
- C.
Cornea, lens, pupil, vitreous humour
- D.
Pupil, cornea, lens, vitreous humour
- E.
Cornea, pupil, lens, vitreous humour
- 11.The proper name for the inability to focus in different planes is
- A.
Hyperopia
- B.
Presbyopia
- C.
Astigmatism
- D.
Myopia
- E.
Glaucoma
- 12.The proper name for farsightedness is
- A.
Hyperopia
- B.
Presbyopia
- C.
Astigmatism
- D.
Myopia
- E.
Glaucoma
- 13.
![A block of glass is pushed into the path of the light, as shown below.The point where the light rays cross will - ProProfs]( "A block of glass is pushed into the path of the light, as shown below.The point where the light rays cross will")
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
- 14.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
- 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
- E.
Larger and virtual
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