Q1. The phenomenon of polarization of electromagnetic waves proves that elecctromagnetic waves are .................
(D) None of these
Q2. Light from two coherence source of the same amplitude A and wavelength &lemda;, illuminate the screen. The intensity of the central maximum is I0. If the source were incoherence, the intensity at the same point will be ...........
Q3. When the angle of incident is 60° on the surface of a glass slab, it is found that the reflected ray is compeletly polarized. Then the velocity of light in .............. ms-1
Q4. Two beams of Light of intensity I1 and I2 interference to give an interference
pattern. If the ratio of maximum intensity to that of minimum intensity is 16/4 then I1/I2 = ..................
Q5. Which of the following phenomenon is used in optical fibers ?
(C) Total internal reflection
Q6. Two beam of light having intensity I and 4I interference to produce a fringe pattern on a screen. The phase difference between the resultant intensity at A and B is .............
Q7. A sound source emits sound of 600 Hz frequency, this sound enters by opened door of width 0.75 m. Find the angle on one side at which first minimum is formed. The speed of sound = 300 ms-1
Q8. A palne polarized light is incident normally on the tourmeline plate. its E vectors make an angle of 45° with the optical axis of the plate. Find the percentage difference intial and final maximum values of E vectors.
Q9. In young's double slit experiment, the intensity on screen at a point where path difference is &lemda;, is K, what will be intensity at the point where path difference is &lemda;/4.
Q10. Ordinary light incident on a glass slab at the polarizing angle, suffers a deviation of 22°. The value of angle of refraction in this case is ......
(Ans 1.) C
(Ans 2.) A
(Ans 3.) B
(Ans 4.) D
(Ans 5.) C
(Ans 6.) B
(Ans 7.) D
(Ans 8.) D
(Ans 9.) A
(Ans 10.) C
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