NEET 2020 Exam Paper (180 Q) - Mock Test

For which one of the following, Bohr model is not valid?

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: ($c$ =speed of electromagnetic waves)

The Brewsters angle $i_b$ for an interface should be:

A cylinder contains hydrogen gas at pressure of $249\text{kPa}$ and temperature $27^{\circ }C$. Its density is: ($R=8.3{\text{J mol}}^{-1}{\text{K}}^{-1}$)

A ray is incident at an angle of incidence $i$ on one surface of a small angle prism (with angle of prism $A$) and emerges normally from the opposite surface. If the refractive index of the material of the prism is $\mu$, then the angle of incidence is nearly equal to: