Question

what is the speed of light in air? write the uses and adverse effect of ultraviolet and x-ray with proper explanation.


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Answer 1

Answer:

Hi buddy

Explanation:

SPEED OF LIGHT

3×10⁸ Light in the air .

(The speed of light in air is around 299,705 kilometres per second or 2.99705×108 m/s 2.99705 × 10 8 m / s .)

What are the harmful effects of X ray and ultraviolet radiation?

Unlike X-rays, ultraviolet radiation has a low power of penetration; hence, its direct effects on the human body are limited to the surface skin. The direct effects include reddening of the skin (sunburn), pigmentation development (suntan), aging, and carcinogenic changes.

Answer 2

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The speed of light in air is $\large {3×10^8m/s}$

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ultraviolet radiation, x-ray

Uses of uv:-

1)produces vitamin D in food of plants and animals.

2) used for sterilization of water.

Effects of UV:-

Can cause health hazard like a skin cancer if our body is exposed to the radiation for a long period.

Uses of X-ray :-

1) used for detection of fracture in bones and teeth and for diagnostic purposes.

2) used in crystallography.

Effects of X-ray :-

Can damage can damage living cell if hard X rays fall on them.

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