Light Class 7 Extra Questions and Answers Science Chapter 15

Light Class 7 Extra Questions and Answers Science Chapter 15 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis.

Class 7 Science Chapter 15 Extra Questions and Answers Light

Extra Questions for Class 7 Science Chapter 15 Light with Answers

Light Class 7 Extra Questions Very Short Answer Type

Question 1.
What is the path travelled by light?
Answer:
Path travelled by a light is a straight line.

Question 2.
What is reflection?
Answer:
The phenomenon of change of direction of light when it falls on a polished surface is called reflection.

Question 3.
What makes objects visible to us?
Answer:
Objects are visible to us only when light reflected from them reaches o.ur eyes.

Question 4.
How is the word ‘AMBULANCE’ written on an ambulance?
Answer:
The word ‘AMBULANCE’ is written laterally inverted on an ambulance. It appears as ‘ONAJUBMA’.

Question 5.
A hollow rubber ball is cut. Which are its convex and concave surfaces?
Answer:
The inner surface of the cut ball is called concave and the outer surface is called convex.

Light Class 7 Extra Questions Short Answer Type 1

Question 1.
Draw concave and convex mirrors.
Answer:

Question 2.
Draw convex and concave lens.
Answer:

Question 3.
Draw real image formed by a convex lens.
Answer:

Light Class 7 Extra Questions Short Answer Type 2

Question 1.
Draw real image formation by a concave mirror.
Answer:

Question 2.
Draw image formation by a convex mirror.
Answer:

Question 3.
Draw real image formed by a convex lens.
Answer:

Question 4.
Draw virtual image formed by a convex lens.
Answer:

Light Class 7 Extra Questions Long Answer Type

Question 1.
How will you show that mixing of seven colours, gives white colour.
Answer:
A circular cardboard disc of about 10 cm diameter is taken. This disc is divided into seven segments. The seven rainbow colours are painted on these segments as shown in Fig. (a). A small hole is made at the centre of the disc. The disc is fitted loosely on the tip of a refill of a ball pen so that the disc rotates freely [(Fig. (6)]. The disc is rotated in the daylight. When the disc is rotated fast, the colours get mixed together and the disc appeals to be whitish.

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