Question

1. Sun is a very powerful source of ultraviolet rays. But we do not receive much ultraviolet rays on the surface of the earth. Why?

2. The electric field of an ultraviolet ray is given by E = 60 sin (0.5 × 10³ – 1.5 × 10¹¹t) What is the amplitude of the magnetic field vector in the ultraviolet ray?

Answer 1

1. Ozone prevents the UV ray.

2. B = \(\frac{E}{C}\) = \(\frac{60}{3\times10^8}\)

= 2 × 10^-7wb/m².