In the wave picture of light, intensity of light is determined by square of the amplitude of wave. What determines the intensity of light in the photon picture of light?

State the factors on which the refractive index of a material medium for a given wavelength depends.

Sketch the emergent wave front.

(a) An alternating voltage E = E_o sinωt is applied to a circuit containing a resistor R connected in series with a black box. The current in the circuit is found to be I = I_o sin (ωt + π/4).

(i) State whether the element in the black box is a capacitor or inductor.

(ii) Draw the corresponding phasor diagram and find the impedance in terms of R.

The magnetic field in a plane electromagnetic wave is given by:

B_y = 12 × 10^–8 sin (1.20 × 10⁷ z + 3.60 × 10¹⁵ t) T. Calculate the

(i) Energy density associated with the Electromagnetic wave

(ii) Speed of the wave