If the speed of the light in vacuum is 3x 10/8 find the absolute refractive index of the medium in which the light travels with a speed of 1.2; 10/8m/s

refractive index = 2.5

Explanation:

Refractive index given by the ratio of speed of light in air or vaccum to the speed of light in the medium

ñ = C/V

where C = speed of light in vacuum

v = Speed of light in medium

(3.0 × 10^8)/( 1.2 ×10^8)

= 2.5 ✓

see earlier answer

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j