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Infrared radiations and Ultra Violet radiations:

What are infrared radiations and Ultra Violet radiations?

Ans: Infrared:

Wavelengths larger than visible light

2. Wavelengths range from 0.7mm to 100 mm

3. Used in physiotherapy

Ultra Violet:

1. Wavelengths shorter than visible light

2. Wavelengths range from 0.4 mm to 1 nm

3. Long exposure of body to UV rays causes skin diseases

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