Science for class Six
MCQ on Light
Question 1.
Light travels in
(a) straight line
(b) curved line
(c) zig-zag line
(d) randomly
Answer: (a) straight line
Explanation:
Light travels in straight line.
Question 2.
When an opaque object comes in the path of light it forms
(a) an image with colours
(b) shadow
(c) black and white image
(d) depends on the colour of the light
Answer: (b) shadow
Explanation:
A shadow is formed when an opaque object comes in the way of light.
Question 3.
Which types of objects do not allow light to pass through them?
(a) Translucent
(b) Opaque
(c) Transparent
(d) Penumbra
Answer: (b) Opaque
Explanation:
Opaque objects do not allow the light to pass through them while translucent objects allow only a part of light to pass through them.
Question 4.
Which is an example of a translucent object?
(a) A thin sheet of paper
(b) A thin glass slab
(c) A thin iron sheet
(d) All of these
Answer
Answer: (a) A thin sheet of paper
Explanation:
A thin sheet of paper is transparent.
Question 5.
Bouncing back of light from shining surfaces is called
(a) Reflection
(b) Refraction
(c) Bending
(d) Dispersion
Answer: (a) Reflection
Explanation:
When a ray of light falls on a smooth and polished surface, whole of light is returned back in the same medium. It is called reflection of light.
Question 6.
What is lateral inversion?
(a) Image becomes inverted
(b) Image bends laterally
(c) Right of the object appears left of the image
(d) All of these happen
Answer: (c) Right of the object appears left of the image
Explanation:
Right side of the object appears as left side in the image formed by a plane mirror.
7.
Which of the following is a cold source of light?
(a) Firefly (Jugnu)
(b) Tube light
(c) The sun
(d) Electric bulb
Answer
Answer: (a) Firefly (Jugnu)
Explanation:
Firefly (Jugnu) emits short bursts of light.
(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) Scattering back of the light by shining surface
(h) Lateral inversion (vii) Phenomenon of changing left to right
(a) Transparent- Object through which one can see clearly
(b) Opaque -Object through which one cannot see at all
(c) Translucent-Object through which we can see clearly
(d) Luminous body- Produces light of its own
(e) Shadow - Region of absence of light
(f) Image-Formed due to reflection by mirrors
(g) Reflection- Scattering back of the light by shining surface
(h) Lateral inversion- Phenomenon of changing left to right
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