যদি কোনো মাধ্যমের আলোর গতি `2xx10^8m//sec` হয়। মাধ্যমের প্রতিসরণ সূচক খুঁজুন।

(2.4xx10^3)div(8xx10^2)= ?

If speed of light in a medium is 2xx10^8m//sec . Find refractive index of medium.

The mass of photon moving with the velocity of 3 xx 10^(8)m//sec with wave length 3.6 A^(@) is

The speed of light in medium A is 2.0xx10^8m//sec and that in medium B is 2.4xx10^8m//sec . The critical angle of incidence for light tending to go from medium A to medium B is

Electro magnetic waves travel in a medium with speed of 2xx10^(8)m//sec . The relative permeability of the medium is 1 find relative permittivity.

The sped of light in water is 2.25 xx 10^(8) m//s and that in glass in 2 xx 10^(8) m//s .Find the refractive index of (i) the glass with respect to water (ii) water with respect to the glass.

The velocity of light in glass medium is 2 xx 10^(8)m//s . The refractive index of glass if speed of light in air is 3 xx 10^(8)m//s is

The speed of light in air and glass is 3 xx 10^(8) m//s , and 2 xx 10^(8)m//s respectively. A beam of light falls on a glass at an angle of 30^(@) with the surface. The angle of refraction in glass is

Light ray is travelling from a denser medium into a rarer medium. The velocity of light in the denser and rarer medium is 2 xx 10^(8) m/sec and 2.5 xx 10^(8) m / sec. The critical angle of the two media is