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प्रश्न
Answer the following.
What is meant by luminous intensity? What is one lumen?
उत्तर
The measurement of the brightness of the light is called luminous intensity.
One lumen is considered to 1 / 1256 th of candle power.
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संबंधित प्रश्न
Match the following
| (a). A light ray passes from air to glass | (1) . speeds up |
| (b). A light ray passes from glass to water | (2). reflects red light |
| (c). Virtual image | (3). primary colours |
| (d). Red rose | (4). plane mirror |
| (e). Red, green, and blue | (5). slows down |
Write true or false of the following statement.
The moon is a natural source of light.
Tick the correct answer.
Light causes
Tick the correct answer.
The natural source of light is
Write true or false
The earth has its own light.
Write true or false
Opaque objects do not allow light to pass through them.
Answer the following.
List four natural sources of light.
Answer the following.
Differentiate between luminous and non-Luminous objects.
State whether true or false. If false, correct the statement.
If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.
Velocity of light is greater in denser medium than in rarer medium
