5(iii)
(a) Name the radiations :
(b) Name one property common to all electromagnetic radiations.
- (a)for which a quartz prism is used to study the spectrum.
- (b)which are used in remote sensing devices.
- (c)which are used in traffic signals in India.
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(a)
- For ultraviolet radiation, a quartz prism is used since, ordinary glass absorbs UV radiation.
- Infra red radiation.
- Visible light radiation (Red, Yellow, Green)
(b) All electromagnetic radiations travels with the same speed ie., 3 × 108 ms-1.