Question

Compare the following: i) wavelength of incident solar radiation absorbed by the Earth's surface and the radiation re-radiated by Earth ii) tanning effect produced on the skin by UV radiation incident directly on the screen that coming through the glass window

Answer 1

Ultraviolet radiation (UVR) is characterized by wavelengths between 10 and 400 nm— bordered on the one side by x rays and on the ...

Answer 2

Hey dear,

● Comparison I -
- Radiation absorbed by earth's surface has peak wavelength (400-750 nm). i.e. its peak lies in visible region of EMS.
- Radiation re-radiated by earth has peak wavelength (10 μm). i.e. its peak lies in infrared region of EMS.

● Comparison II -
- UV radiation is emitted by sun and mostly harmful to health.
- Ozone layer in stratosphere prevents most of these harmful rays from reaching the earth this protecting us.
- When these UV radiation falls on us through glass, these effects are less as compared to direct contact with skin.

Hope this helps you...