Students can practice the best Class 7 Science MCQ and Light Shadows and Reflections Class 7 Science Curiosity Chapter 11 MCQ Online Test with Answers for exam preparation.
Class 7 Science Chapter 11 Light Shadows and Reflections MCQ
Light Shadows and Reflections MCQ Class 7
MCQ On Light Shadows and Reflections Class 7
Question 1.
Which of the following travels in a straight line?
(a) Sound
(b) Water
(c) Light
(d) Heat
Answer:
(c) Light
Question 2.
A shadow is formed when an object:
(a) Reflects light
(b) Allows all light to pass through
(c) Blocks the path of light
(d) Emits its own light
Answer:
(c) Blocks the path of light
Question 3.
In a pinhole camera, the image formed is:
(a) Virtual and erect
(b) Real and inverted
(c) Virtual and inverted
(d) Real and erect
Answer:
(b) Real and inverted
Question 4.
What helps us to see our reflection?
(a) Transparent glass
(b) Polished wooden surface
(c) Plane mirror
(d) Wall
Answer:
(c) Plane mirror
Question 5.
What do we require to observe a shadow?
(a) Light, object, and screen
(b) Light, mirror, and object
(c) Only object
(d) Only screen
Answer:
(a) Light, object, and screen
Question 6.
Why does shadow size change during the day?
(a) Light quality changes
(b) Sun’s position changes
(c) Object changes
(d) Temperature varies
Answer:
(b) Sun’s position changes
Question 7.
What is the function of a periscope?
(a) Collect solar energy
(b) Measure light intensity
(c) See over or around obstacles
(d) Capture photographs
Answer:
(c) See over or around obstacles
Question 8.
Which device forms beautiful patterns using reflection?
(a) Microscope
(b) Telescope
(c) Kaleidoscope
(d) Barometer
Answer:
(c) Kaleidoscope
Question 9.
Which component in a kaleidoscope forms multiple reflections?
(a) Glass
(b) Plastic
(c) Mirrors
(d) Cardboard
Answer:
(c) Mirrors
Question 10.
The fireflies number is reducing due to:
(a) reduced forest cover
(b) light pollution
(c) excessive tourism
(d) all of these
Answer:
(d) all of these
Question 11.
The objects emitting their own light are:
(a) a lantern
(b) a candle flame
(c) moon
(d) none of these
Answer:
(d) none of these
Question 12.
A LED lamp consume:
(a) less power
(b) brighter in light
(c) lasts longer
(d) all of these
Answer:
(d) all of these
Question 13.
The light travels in a:
(a) zig-zag line
(b) bended line
(c) both (a) and (b)
(d) none of these
Answer:
(d) none of these
Question 14.
Which one is transparent object?
(a) glass
(b) bird
(c) thick cloth
(d) all of these
Answer:
(a) glass
Question 15.
The opaque material are:
(a) glass bird
(b) metal sheet
(c) steel utensil
(d) none of these
Answer:
(d) none of these
Question 16.
A shadow is formed:
(a) light is blocked
(b) dark patch
(c) light reaches there
(d) none of these
Answer:
(d) none of these
Question 17.
Shadow formation needs:
(a) light source
(b) opaque object
(c) a screen
(d) all of these
Answer:
(d) all of these
Question 18.
Image formed by a plane mirror is:
(a) upright
(b) erect
(c) both (a) and (b)
(d) none of these
Answer:
(c) both (a) and (b)
Question 19.
A periscope is made by:
(a) 2 flames
(b) Z shape
(c) mirrors
(d) none of these
Answer:
(c) mirrors
Light Shadows and Reflections Class 7 Assertion Reason Questions
Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
1. Assertion (A): The objects which allow the light to pass through them are called translucent objects.
Reason (R): Glass sheets, water, and air are examples of transparent objects.
Answer:
(d) (A) is false but (R) is true.
2. Assertion (A): Never look directly at the sun it may be extremely harmful for our eyes.
Reason (R): Pinhole camera can be used for brightly little objects.
Answer:
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
3. Assertion (A): In mirror image, the left side of the object is seen as the right side in the image.
Reason (R): The capital English letter ‘H’ does not show a lateral inversion.
Answer:
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
4. Assertion (A): The Moon is visible at night because it emits its own light.
Reason (R): The moon reflects sunlight falling on it.
Answer:
(c) (A) is true but (R) is false.
5. Assertion (A): Light passes through transparent objects and forms no shadow.
Reason (R): Transparent objects allow most of the light to pass through them.
Answer:
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
Light Shadows and Reflections Class 7 Fill in the Blanks
1. Changing of left side of object to right side of image is called ________.
Answer:
lateral inversion
2. Plane mirror forms only a ________ image of an object.
Answer:
single
3. Kaleidoscope is based on the concept of ________.
Answer:
multiple reflection
4. Shadows are formed when an ________ object comes in the path of light.
Answer:
opaque
5. Glass is ________ but plastic is ________.
Answer:
transparent, opaque
6. Pinhole camera provides ________ down image.
Answer:
upside
7. Light gets ________ when it falls on a mirror.
Answer:
reflected
8. In ________, a transparent plastic sheet is used.
Answer:
kaleidoscope
9. Light passes by a hole in ________ camera.
Answer:
pinhole
10. A ________ is used in submarines.
Answer:
periscopes.
Light Shadows and Reflections Class 7 True or False
1. An image formed by a plane mirror is erect.
Answer: True
2. Mirror does not change the direction of light that falls on it.
Answer: False
3. The shadow of a coloured object is also coloured.
Answer: False
4. Black thick paper is translucent.
Answer: False
5. Moon is a non-luminous body.
Answer: True
6. A periscope has six mirrors in it.
Answer: True
7. Image formed by a plane mirrors cannot be get on a screen.
Answer: False
8. Colour change of an opaque doesn’t change colour of a shadow.
Answer: True