Download App

PHYSICS [3 Mark Question Answer]

Unit - 4.1 Light And General Terms Used In Understanding Light · ICSE STD 7 (ICSE - English Medium). 2 questions.

Questions

[3 Mark Question Answer]

🎯

Test yourself on this topic

2 questions · timed · auto-graded

Question 13 Marks
Define rectilinear propagation of light.
Answer
Rectilinear propagation of light:
1.Rectilinear$\sim$ means straight.
2.Propagation$\sim$means travelling of light.
The property of light travelling in a straight lines in a homogenous transparent medium is known as rectilinear propagation of light.
Light does not bend. This is the reason why you are unable to see around a corner.
View full question & answer→
Question 23 Marks
By giving three examples define natural sources of light.
Answer
Three examples define natural sources of light:
1.A natural source of light is light that occurs naturally without the involvement of humans.
2.Natural sources of light can come from either an object or a living species.
3.Sun, stars, lightning, jellyfish, fireflies, glowworms, bush fires, angler fish, and other natural light sources are examples.
View full question & answer→
Generate Paper FreeAll Unit - 4.1 Light And General Terms Used In Understanding Light topics
[3 Mark Question Answer] - PHYSICS STD 7 Questions - Vidyadip