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

Too many questions in a single post,

22. intensity of polarised light I = I_0 * (cos 60)^2 = 0.25 I_0

23. bright ( in fact it is brighest of all)

24. E = 6 , as B = E/c = 6/(3x10^8) = 2 x 10^-8 T

25 lamda = 589 nm

as c = lamda* freq

frequency = c/589 nm = 5.09 x 10^14 rad/s

26 ans : option a

27 phase change = 180 degrees

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