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A laser beam is used for carrying out surgery because it

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Important Questions on We See Light

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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light

Name the thing with the help of which we get light. Fill in the blank and find out. 

 C _ n d l e

The complete word is _____.

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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light

Fill in the blank with an appropriate word:

_____ (Oil lamp/Electric bulb) is the thing with the help of which fire gives us light.

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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
Unscramble the words given below to find the sources of light.
DANCLE: _____
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
_____ light is used in cancer therapy.
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
Choose the odd one.
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
A ruby laser produces of wavelengths, 662.6 nm in pulse whose duration are 10-9 s. If the laser produces 0.39 J of energy per pulse, how many photons are produced in each pulse?
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
Which component of air is used in sign boards? 
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
List a few examples for luminous objects?
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
What does LASER mean?
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
What is the advantage of laser light?
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light

Write ‘A’ for artificial sources of light and ‘B’ for natural sources of light.

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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
Give one word for the following. 
Name the gas used in advertising signboards.
N____.
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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light

Name the following.

This gas is used in the glowing signboard.

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Environmental Studies>The World Around Me>We See Light>Man Made Sources of Light
Neon gas is used in glowing signboards.