Practicing Class 7 Science MCQ and Class 7 Science Chapter 11 Light Shadows and Reflections MCQ Questions Online Test with Answers daily helps in time management.
Class 7 Light Shadows and Reflections MCQ with Answers
MCQ on Light Shadows and Reflections Class 7
Class 7 Science Chapter 11 Light Shadows and Reflections MCQ Questions with Answers
Question 1.
If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be
(a) 2 m
(b) 1 m
(c) 0.5 m
(d) 0.25 m
Answer:
(b) 1 m
Question 2.
An object, through which we can see partially, but not very clearly, is—
(a) a rubber ball
(b) a sheet of tracing paper
(c) sheet of plane glass
(d) a compact disk
Answer:
(b) a sheet of tracing paper
Question 3.
When light strikes on a plane mirror
(a) it reflects
(b) it scatters in all directions
(c) it is absorbed by the surface
(d) none of the above.
Answer:
(a) it reflects
Question 4.
Which instrument uses mirrors to observe objects not in direct line of sight?
(a) Periscope
(b) Kaleidoscope
(c) Pinhole camera
(d) Microscope
Answer:
(a) Periscope
Question 5.
When sun (during early morning) is behind an object, the size of its shadow in comparison to that of the object would be—
(a) smaller
(b) larger
(c) equal
(d) almost zero
Answer:
(b) larger
Light Shadows and Reflections Class 7 Assertion-Reason Type Questions
Assertion-Reason Questions Directions: Each of the questions (i) and (ii) contain two statements – first ‘Assertion’ and second ‘Reason’. Select the correct answer to these question from the codes (a), (b), (c) or (d) as given below:
(a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(b) Both Assertion and Reason are true and Reason is NOT the correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
(i) Assertion (A): When the light from a source falls on a mirror it gets reflected.
Reason (R): On being reflected there is no change in the direction of light.
Answer:
Assertion is true and Reason is false.
Explanation:
The assertion that light reflects off a mirror is correct statement. When light hits a mirror’s surface, it does not pass through; it bounces back, or is reflected. The reason states that there’s no change in the direction of light during reflection. This is incorrect. Reflection does involve a change in direction.
(ii) Assertion (A): We cannot see the candle flame through the bent rubber tube.
Reason (R): Light does not travel in air.
Answer:
Assertion is true and Reason is false.
Explanation:
We cannot see the candle flame through the bent rubber tube because light travels in a straight line.
Light Shadows and Reflections Class 7 Fill in the blanks
1. An object that allows light to pass through it (almost) completely, is known as ________ object.
Answer:
transparent
2. A shadow is observed, on a screen, when an ________ object comes in, between it and a source of light.
Answer:
opaque
3. Shadows formed are always ________ irrespective of the colour of the object.
Answer:
black
4. A periscope uses ________ to observe objects not in direct line of sight.
Answer:
mirrors
5. When light is reflected from a plane mirror, it changes its ________ of propagation.
Answer:
direction
Light Shadows and Reflections Class 7 True or False
Question 1.
The reflection, formed by a plane mirror; shows the right side of the object as its right side and the left side of the object as its left side.
Answer:
False. Reason: The reflection formed by a plane mirror is laterally inverted (The reflection is flipped horizontally, left becomes right and – vice versa).
Question 2.
An object can be seen only if it emits light.
Answer:
False. Reason: The object can be seen due to reflection of light.
Question 3.
Reflection occurs when light bounces back from a surface.
Answer:
True
Question 4.
The colour of the object determines the colour of the shadow.
Answer:
False. Reason: The colour of the shadow of a given object does not depend on the colour of the object, as the shadows are always dark.
Question 5.
Transparent objects allow light to pass through them partially.
Answer:
False. Reason: Translucent objects are objects which allow light to pass through them partially, and transparent objects allow light to pass through them completely.
Light Shadows and Reflections Class 7 Match the following
Question 1.
Match the following items given in Column A with that in Column B:
| Column A | Column B |
| 1. Natural sources of light | (a) light moves along a straight path |
| 2. CFL, LED and tube light | (b) lateral inversion |
| 3. Rectilinear propagation of light | (c) Shadow formation |
| 4. Opaque objects blocking light | (d) man made sources of light |
| 5. Interchange of the ‘left’ and ‘right’ sides in the image | (e) sun, stars and firefly |
Answer:
| Column A | Column B |
| 1. Natural sources of light | (e) sun, stars and firefly |
| 2. CFL, LED and tube light | (d) man made sources of light |
| 3. Rectilinear propagation of light | (a) light moves along a straight path |
| 4. Opaque objects blocking light | (c) Shadow formation |
| 5. Interchange of the ‘left’ and ‘right’ sides in the image | (b) lateral inversion |
Question 2.
Match the following items given in Column A with that in Column B:
| Column A | Column B |
| (a) Transparent | (i) Region of absence of light |
| (b) Opaque | (ii) Change of direction of the light by shining surface |
| (c) Translucent | (iii) Object through which one can see clearly |
| (d) Luminous body | (iv) Object through which one cannot see at all |
| (e) Shadow | (v) Formed due to reflection by mirrors |
| (f) Image | (vi) Object through which we cannot see clearly |
| (g) Reflection | (vii) Phenomenon of changing left to right |
| (h) Lateral inversion | (viii) Produces light of its own |
Answer:
| Column A | Column B |
| (a) Transparent | (iii) Object through which one can see clearly |
| (b) Opaque | (iv) Object through which one cannot see at all |
| (c) Translucent | (vi) Object through which we cannot see clearly |
| (d) Luminous body | (viii) Produces light of its own |
| (e) Shadow | (i) Region of absence of light |
| (f) Image | (v) Formed due to reflection by mirrors |
| (g) Reflection | (ii) Change of direction of the light by shining surface |
| (h) Lateral inversion | (vii) Phenomenon of changing left to right |