Question

What is ultraviolet rays​

Answer 1

Explanation:

Ultraviolet is a form of electromagnetic radiation with wavelength from 10 nm to 400 nm, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun.

Answer 2

UV light (ultraviolet light) is having a wavelength between 10 and 400 nm that is shorter than the visible light but longer than the X-rays and is a type of electromagnetic radiation. These are present in sunlight and contributes 10% of the total light from the sun.

Types of UV light

UV light or UV ray is classified into three components ultraviolet A (UVA), ultraviolet B (UVB), and ultraviolet C (UVC). Following is the table explaining the characteristics of these components:

Ultraviolet A (UVA):

Most of the UV (98.7%) that reaches us on the earth’s surface is of type UVA and is affected by the ozone

Fading of paints and dyes.

UVA causes early aging of the skin.

UVA causes skin cancer called melanoma.

Ultraviolet B (UVB):

1.3% of the UV reaches the earth’s surface and is highly affected by ozone.

These rays are responsible for sunburn and tan.

For the production of vitamin D, 270-300 nm wavelengths are stimulated.

Ultraviolet C (UVC):

UVC rays do not reach the earth’s surface as most of them absorbed by the atmospheric nitrogen, oxygen, and ozone, and the rest are scattered.

UVC causes lesions on the skin.

Below is the experiment to understand how UV protection is obtained using sunglasses

hope it's helpful for you!!