MCQ
When light wave suffers reflection at the interface from air to glass, the change in phase of the reflected wave is equal to
- A0
- B$\frac{\pi}{2}$
- ✓$\pi$
- D$2\pi$
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Statement$- I$ : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature.
Statement$- II$: Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field. Choose the $CORRECT$ answer from the options given below : -