Correct Answer - Option 3 : Ozone layer
The correct answer is Ozone layer.
OZONE LAYER:
- The ozone layer is an area or a continuous region in the stratosphere of the earth that includes high concentrations of ozone(O3) and protects the earth from the sun's harmful ultraviolet radiation.
- It has the ability to absorb the sun's harmful ultraviolet radiation, which can damage life on Earth.
- UV radiation, which is made up of various types of photons, is found in sunlight. UVA and UVB rays are the two forms of UV radiation you're probably most familiar with.
- These rays can have a variety of effects on your skin.
- The comparison between the UV A and UV B is :
| CHARACTERISTIC |
UV A
|
UV B
|
| energy level |
minimum |
medium |
| Wavelength |
Longest |
Medium |
| Ozone layer absorption |
Not absorbed by the ozone layer |
absorbed by the ozone layer (almost all ) |
| Skin cell effected |
affecting cells deeper in the skin |
Affecting cells on the top layer of the skin |
| Damage to DNA |
Indirect damage |
Direct damage |
| Source |
Sunlight |
Sunlight |
| Penetration |
More penetration than UV B |
Lesser penetration than UV A |
- The ozone layer thus doesn't allow the penetration of only UV B radiations coming from the sun to the earth.
Hence, the following harmful radiations from the sun are absorbed by the ozone layer is - UV B (Ultraviolet Radiation or Rays B)
