First slide

Radiation

Question

Thermal radiation falls in

Easy

A

Visible region
B

Cosmic region
C

Ultra violet region
D

Infrared region

Solution

Wavelength of visible radiation lies between 4000 $\overset{0}{A}$ and 7000 $\overset{0}{A}$ . Wavelength of thermal radiation is more than 7000 $\overset{0}{A}$ . So option - (4) is right.

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