How can I improve the understanding of concepts related to Class 12 Chapter 10 Wave Optics?

A fish from inside water sees a bird in air at a distance

A ray of light strikes a silvered surface as shown inclined to another one. Then the net deviation of the reflected rays will be

Assertion (A) - When constant current is passing through a conductor of variable area of cross section, electric field inside conductor is inversely proportional to cross sectional area.

 

The current gain for a common emitter transister is 69. If the emitter current is 7 mA then base current will be

If refractive index of red, violet and yellow lights are 1.42, 1.62 and 1.50 respectively for a medium, its dispersive power will be :-