The polarizing axis of a polarizing filter is 60degrees from the vertical. When

Question

The polarizing axis of a polarizing filter is 60degrees from the vertical. When an unpolarized light of intensity Io passes through it, the intensity of the transmitted light is I_0. 0.75 I_0. 0.5 I_0. 0.25 I_0. The central fringe in Young's double-slit interference is bright. dark. neither dark nor bright. The central spot of Newton's rings is bright. dark, neither dark nor bright. An electromagnetic wave is traveling in midast x direction. The amplitude of the electric field is 6.0 V/m. The amplitude of the magnetic field is 6.0 T. 2.0 times 10^-8 T. 1.8 times 10^9 T. The wave length of a yellow light is 589 nm. The frequency of the light is 5.09 times 10^14 rad/s. 5.09 times 10^5 Hz. 5.09 times 10^14 Hz. Light passes through an aperture of diameter a. The condition for the ray approximation in geometrical optics is: a >> lambda. a

Explanation / Answer

21) c)0.5*Io22

22) a) bright

23) a) bright

24) b)2*10^-8 T

25) c) 5.09*10^14 hz

26) c

27) a

28) c

A)

a) C = A*epsilon/d

= 22*10^-4*8.854*10^-12/(0.16*10^-3)

= 1.22*10^-10 F

b) E = V/d

= 9/(0.16*10^-3)

= 56250 N/c

c) UE = 0.5*C*V^2

= 0.5*1.22*10^-10*9^2

= 4.9*10^-9 J

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