1(v)
Assertion (A) : Ultraviolet radiations are scattered more as compared to the microwave radiations.
Reason (R) : Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation.
- (a)Both A and R are true.
- (b)A is true but R is false.
- (c)A is false but R is true.
- (d)Both A and R are false.
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A is true but R is false.
Explanation
Assertion (A) is true: Scattering of light is inversely proportional to the fourth power of its wavelength (Scattering ∝ $\frac{1}{\text λ^4}$)
Since ultraviolet radiation has shorter wavelength than microwave radiation which implies ultraviolet radiations will be scattered more than microwave radiation.
Reason (R) is false: Ultraviolet radiation has a much shorter wavelength (around 10–400 nm) than microwaves (which have wavelengths in the millimeter to centimeter range, i.e., 1 mm to 1 m).