Class 7 Science Chapter 11 MCQ Light
MCQ on Light Class 7
Select and write the most appropriate option out of the four options given
I. Multiple Choice Questions
Question 1.
Light always travels in a ………… path.
A) straight
B) curved
C) sometimes straight, sometimes curved
D) none of these
Answer:
A) straight
Question 2.
We cannot see a lighted candle through a bent pipe because
A) we can only see through a transparent object
B) bent pipe is an opaque object
C) reflection of bight does not occur due to bent pipe
D) light travels in a straight line.
Answer:
D) light travels in a straight line.
Question 3.
The property of light travelling in a straight line is known as
A) scattering of light
B) dispersion of light
C) rectilinear propagation of light
D) reflection of light.
Answer:
C) rectilinear propagation of light
Question 4.
The path of light can be changed
A) only by placing a mirror in its path
B) by placing any shiny surface in its path
C) both A and B
D) neither A nor B
Answer:
C) both A and B
Question 5.
A polished surface acts as a/an
A) mirror
B) image
C) shadow
D) screen
Answer:
A) mirror
Question 6.
Which of the following shows reflection?
A) Wood
B) Plastic
C) water
D) None of these
Answer:
C) water
Question 7.
In the mirror image of word ‘TRAVELLING’, which alphabets appear smaller than their original size?
A) E and L
B) R and I
C) All of these
D) None of these
Answer:
D) None of these
Question 8.
The image formed in a plane mirror is always
A) erect and laterally inverted
B) upside down
C) straight and blurred
D) larger than the original size.
Answer:
A) erect and laterally inverted
Question 9.
In the mirror image of word ‘ELECTRIC’, which alphabets are written as same?
A) E and C
B) L and I
C) T and l
D) C and L
Answer:
C) T and l
Question 10.
A ………… mirror is used as the rear view mirror of vehicles.
A) concave
B) plane
C) convex
D) none of these
Answer:
C) convex
Question 11.
Enlarged and virtual images are created by
A) concave mirrors
B) plane mirrors
C) convex mirrors
D) concave lenses.
Answer:
A) concave mirrors
Question 12.
In a ………… mirror, the reflecting surface is curved outwards.
A) plane
B) concave
C) convex
D) all of these
Answer:
C) convex
Question 13.
White light is composed of ………… colours.
A) five
B) seven
C) nine
D) eight
Answer:
B) seven
Question 14.
If Newton’s colour disc is rotated rapidly, then
A) seven colours of light look like a single colour black
B) seven colours of light look like a single colour violet
C) seven colours of light look like a single colour white
D) none of these
Answer:
C) seven colours of light look like a single colour white
Question 15.
Which one of the following statements regarding a rainbow is correct ?
A) It is always seen as a circle.
B) The order of colours is always (from top to bottom as seen from the ground) violet, indigo, blue, green, yellow, orange, red.
C) Its order of colours is always (from top to bottom as seen from the ground) red, orange, yellow, green, blue, indigo, violet.
D) The order of colours can be either violet to red or red to violet depending upon the time of the day.
Answer:
C) Its order of colours is always (from top to bottom as seen from the ground) red, orange, yellow, green, blue, indigo, violet.
Question 16.
What is the angle of incidence and angle of reflection in the given figure ?
A) 360°
B) 180°
C) 90°
D) 0°
Answer:
D) 0°
Question 17.
When a ray of light is reflected from a surface, then ………… changes. [ ]
A) direction of light
B) speed of light
C) both (A) and (B)
D) colour of light
Answer:
A) direction of light
Question 18.
Which of the following cases is/are possible for convex lens?
A) (i) and (ii)
B) (ii) and (iii)
C) (iii) and (i)
D) Only (i)
Answer:
B) (ii) and (iii)
Question 19.
If the angle of incidence is 60°, then the angle of reflection will be
A) 30°
B) 60°
C) 120°
D) 180°
Answer:
B) 60°
Question 20.
The angle of incidence is formed between the
A) incident ray and the normal
B) reflected ray and the normal
C) incident ray and the mirror
D) reflected ray and the mirror
Answer:
A) incident ray and the normal
Question 21.
The given figure shows
A) diffused reflection
B) refraction
C) regular reflection
D) none of these
Answer:
A) diffused reflection
Question 22.
An object Is held in front of a plane mirror.
Which of the following images will be formed?
Answer:
(B)
Question 23.
Refraction of light occurs due to
A) the colour of the medium
B) the absorption of light
C) a change in the direction of light
D) a change in the speed of light.
Answer:
D) a change in the speed of light.
Question 24.
If ∠R=35°, then ∠T will be equal to
A) 35°
B) 90°
C) 55°
D) 53°
Answer:
C) 55°
Question 25.
The diagram given below shows magenta light shining through the prism and it splits into the colours X and Y . The two colours X and Y are respectively. [ ]
A) red and blue
B) blue and green
C) green and red
D) blue and red
Answer:
A) red and blue
Question 26.
The image of the teeth seen by a dentist while testing teeth is
A) erect and real
B) erect and virtual
C) inverted and virtual
D) inverted and real
Answer:
B) erect and virtual
II. Fill in the blanks
1. A/An ………… shows the details of an object like colour, shape etc.
Answer: image
2. ………… is the phenomenon of bouncing back of light into the same medium.
Answer: reflection
3. An opaque, smooth, highly polished surface, typically made of glass coated with a metal amalgam, which reflects a clear image is called …………
Answer: mirror
4. The mirrors used as rear view mirrors in cars and in car headlights are ………… and ………… respectively.
Answer: convex, concave
5. ………… mirrors make things look larger when objects are placed close to them.
Answer: concave
6. The image that can be obtained on a screen is called ………… image.
Answer: real
7. A ………… lens is used as a magnifying glass.
Answer: convex
8. ………… lens always forms a virtual image.
Answer: concave
9. The lenses which are thicker in the middle than at the edges are called …………
Answer: convex
10. If we mix the colours of rainbow, we will get ………… light.
Answer: white
11. The ………… colour bends the most when white light is passed through a prism.
Answer: violet
12. We can see a rainbow only when our ………… is towards the Sun.
Answer: back
13. Real images are always ………… and formed on the ………… side of the mirror.
Answer: inverted, front
14. Human eye forms an inverted image of an object on ………… after light passing through the lens.
Answer: retina
15. There is a ………… lens in each of our eyes.
Answer: convex
16. ………… was the first to show that ordinary white light is made up of seven colours.
Answer: Issac Newton
17. The image formed by a projector in a cinema hall is ………… in nature.
Answer: real
18. An arrow which represents the direction of propagation of light is called a……….. A bundle of rays is called a ………… .
Answer: ray, beam
19. A drop of water on a leaf forms a magnified image of the veins because of ………… shaped water droplets.
Answer: convex
20. As you move an object from a distance to the focus of a concave mirror, the image moves ………… the mirror.
Answer: a way from
21. The phenomenon of splitting of white light into its seven constituent colours is known as …………
Answer: dispersion
III. True Or False
1. A plane mirror forms an erect image.
Answer: True
2. The size of the image in a mirror is same as the size of the object.
Answer: True
3. A polished surface does not show reflection.
Answer: False
4. Objects are visible only when light reflected from them reaches our eyes.
Answer: True
5. Doctors use convex mirror for examining eyes, ears, nose and throat.
Answer: False
6. A virtual image can be obtained on a screen.
Answer: False
7. A concave mirror forms a real as well as an inverted image.
Answer: True
8. Concave lens forms a diminished image.
Answer: True
9. Convex lens can form both real and virtual images.
Answer: True
10. If a far away object is brought towards the focus of a convex lens, the size of the image will increase.
Answer: True
11. The image formed by a plane mirror is always so far behind the mirror as far the object lie in front of it.
Answer: True
12. Concave lens is used in spectacles to correct far sightedness.
Answer: False
13. The surfaces of the lens are ideally perpendicular to each other.
Answer: True
14. The image of symmetrical letters like A, H, I, M, T$ and U are not afftected by lateral inversion.
Answer: True
15. Plane mirror obeys laws of reflection.
Answer: True
16. Convex lens is diverging in nature.
Answer: False
17. A concave lens is used by a man while shaving.
Answer: False
18. The colour of the reflected light gives the object its colour.
Answer: True
19. Our eyesight is completely dependent on light which causes the sensation of vision.
Answer: True
20. The image formed by a plane mirror can be projected on a screen.
Answer: False
IV. Matching
| Column – I | Column – II |
| A) Used in street light | i) Concave mirror |
| B) Image formed is upright and of a larger size | ii) Convex mirror |
| C) Thicker in the middle | iii) Concave lens |
| D) Rainbow | iv) Convex lens |
| E) Image formed can be virtual, smaller and in front of device | v) Dispersion |
Answer:
| Column – I | Column – II |
| A) Used in street light | ii) Convex mirror |
| B) Image formed is upright and of a larger size | i) Concave mirror |
| C) Thicker in the middle | iv) Convex lens |
| D) Rainbow | v) Dispersion |
| E) Image formed can be virtual, smaller and in front of device | iii) Concave lens |