The diagram shows the main regions of the electro magnetic spectrum. 1. Write the names of the blank regions.

Question

The diagram shows the main regions of the electro magnetic spectrum.

Gamma Rays

x-ray

....

Visible

.....

Radio wave

1. Write the names of the blank regions.

2. Which radiation shown in the table has the shortest wavelength? 

3. Which ray among these are responsible for green house effect? Explain green house effect.

Answer 1

1. Ultra violet, Infrared.

2. Gamma ray

3. Infrared

Earth is heated by infrared radiations from the sun. At the same time earth radiates longer wavelength to the space. This radiation (outgoing) of longer wavelength is reflected back by CO₂ and other gases.

Hence radiation (from earth) can’t escape from earth’s surface. Thus the temperature at earth’s surface increases. This phenomenon is called Green house effect.