In a Fraunhofer diffraction at a single slit of width ‘ď and incident light of wavelength 5500 Å, the first minimum is observed at an angle 30°. The first secondary maxima is observed at an angle θ

Question:

Options :

(a) sin-1(1/√2)
(b) sin-1(3/4)
(c) sin-1(1/4)
(d) sin-1(√3/2)

Answer :

(b) sin-1(3/4)

Answer Steps :

step 1

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An alternating voltage source is connected in series with a resistance R and an inductance L. If the potential drop across the resistance is 200 V and across the inductance is 150 V, then the applied voltage is:

In an a. c. circuit the instantaneous current and e.m.f. are represented as: I = I0 sin(ωt – π/6) and E = E0 sin(ωt + π /3) respectively. The voltage leads the current by

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