Question

please answer fast its urgent......​......

Answer 1

Answer:

1.Plane mirror

2.Plane of incidence

4.Rainbow(a prism splits white light into all seven colors)

5.Refractive index

6.Quantam theory of light

7.periscope

Answer 2

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1] A highly polished surface which reflects light

• A highly polished surface which reflects light is a plane mirror.

2] The plane containing incident ray and the normal

• The plane containing incident ray and the normal is plane of incidence(AON).

3] An actual representation of an object

• An actual representation of an object is representation(Scientific law)

4] A band of seven colours formed in the atmosphere

• A band of seven colours formed in the atmosphere is rainbow.

5] The ratio by which speed of light is slowed down when it travels through transparent medium

• The ratio by which speed of light is slowed down when it travels through transparent medium is refractive index.

6] Theory proposed by Albert Einstein

• Theory proposed by Albert Einstein is theory of relativity.

7] An instrument used in submarines

• An instrument used in submarines is periscope.

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★ Some Interesting facts :

• Light from the Earth takes just 1.255 s to reach the moon.

• In 1921, the Nobel Prize in Physics was won by Albert Einstein for his work.

• The most abundant atom in the universe is the hydrogen atom.

• A 200 pounds person would only weigh 76 pounds on Mars , because of differences in gravity.

• Sound travels at a speed of around 767 miles per hour .

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