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The sun and ______ are the natural sources of light.
Concept: undefined >> undefined
Fill in the blank
There are ........... and man-made ............ of light.
Concept: undefined >> undefined
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Fill in the blank
The brightness of light is measured in ...................
Concept: undefined >> undefined
Fill in the blank
A ............. is formed when the path of light is obstructed by an ..............
Concept: undefined >> undefined
Fill in the blank
Light consists of .............. colours.
Concept: undefined >> undefined
Fill in the blank
Speed of light in vacuum is .................
Concept: undefined >> undefined
Match the following
| Column A | Column B |
| 1. Transparent object | i. Football |
| 2. Eclipses | ii. Glass |
| 3. Translucent object | iii. Fluorescent tube |
| 4. Luminous object | iv. Tracing paper |
| 5. Non - luminous object | v. Shadows |
Concept: undefined >> undefined
Write true or false
The moon has its own light.
Concept: undefined >> undefined
Write true or false
The earth has its own light.
Concept: undefined >> undefined
Write true or false
The stars have no light.
Concept: undefined >> undefined
Write true or false
Opaque objects do not allow light to pass through them.
Concept: undefined >> undefined
Answer the following.
What is light?
Concept: undefined >> undefined
Answer the following.
List four natural sources of light.
Concept: undefined >> undefined
Answer the following.
Write down five man-made sources of light.
Concept: undefined >> undefined
Answer the following.
What is meant by luminous intensity? What is one lumen?
Concept: undefined >> undefined
Answer the following.
Distinguish between transparent, translucent, and opaque objects.
Concept: undefined >> undefined
Answer the following.
List two transparent objects.
Concept: undefined >> undefined
Answer the following.
Name some sources of light that are not hot.
Concept: undefined >> undefined
Answer the following.
Differentiate between luminous and non-Luminous objects.
Concept: undefined >> undefined
Answer the following in detail.
Differentiate between contract and non-contract force. Support your answer with suitable examples.
Concept: undefined >> undefined
