1. When light wave travels from air into glass its a) speed remains the same, b)
ID: 1522419 • Letter: 1
Question
1. When light wave travels from air into glass its
a) speed remains the same, b) speed increases, c) wavelengths increases, d) wavelength remain the same, e) frequency remains the same
2. When light reflects from a medium of greater index of refraction the EM-wave undergoes the phase change of a) 00, b) 900, c) 1800 , d) 2700
3. A wave passing through a single slit. When the slit is made half as wide the width of the central maximum becomes a) 1/4 as wide, b) 1/2 as wide, c) does not change, d) twice as wide, e ) 4 times as wide.
4. Monochromatic light is an EM wave
a) of red color, b) in the visible spectrum range c) of a single wavelength, d) with nonzero amplitude
5. Two headlights of an automobile produce
a) constrictive interference , b) destructive interference,
c) no interference, d) all of the above depending on the path difference
6. The center spot of Newton’s rings is dark. This destructive interference occurs because a) the two beams travel distances that are different by half of a wavelength.
b) both waves change phase by 1800 as they are reflected.
c) one beam changes phase by 1800 when it is reflected,
d) both waves have a through.
7. When white light passes through transmission diffraction grating an observer sees in the fringe of the 1st order a) a spectrum with the red light being deflected the most,
b) a spectrum with the violet light being deflected the most,
c) a bright white spot with intensity less than in the fringe of order 0 ,
d) a bright white spot with intensity greater than in the fringe of order 0.
8. A diffraction effect for electromagnetic waves becomes significant when
a) the size of the obstacle is less than the wavelength of the EM wave,
b) the size of the obstacle is greater than the wavelength of the EM wave,
c) the color of the light diffracted on the obstacle is violet,
d) the color of the light diffracted on the obstacle is red.
9. A monochromatic light wave falls on a double slit. As the slit separation decreases, the separation between the interference fringes
a) decreases, b) increases, c) remains the same, d) initially increases, then decreases
10. In Young’s double-slit experiment the equation d sin = (m + 12) specifies the condition for a ) constructive interference with the maximum in the fringe of order m,
b) constructive interference with the minimum in the fringe of order m,
c) destructive interference with the maximum in the fringe of order m,
d) destructive interference with the minimum in the fringe of order m
Explanation / Answer
1. When light wave travels from air into glass its: e) frequency remains the same.
Speed and wavelength decreases.
2. When light reflects from a medium of greater index of refraction the EM-wave undergoes the phase change of
c) 180.
3. A wave passing through a single slit. When the slit is made half as wide the width of the central maximum becomes d) twice as wide.
4. Monochromatic light is an EM wave c) of a single wavelength.
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