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WorksheetsDiffraction KS5
Total questions: 10
Worksheet time: 5mins
In a Young's double-slit experiment, the slit separation is doubled. To maintain the same fringe spacing on the screen, the screen-to-slit distance D must be changed to:
D/2
D 2
2D
4D
Constructive interference happens when two waves are:
out of phase.
zero amplitude.
in phase.
Extra distance travelled by one of waves compared with other is called
path.
displacement.
phase difference.
path difference.
What principle is responsible for light spreading as it passes through a narrow slit?
refraction
polarization
diffraction
interference
Two light sources are said to be coherent if they
are of the same frequency.
are of the same frequency, and maintain a constant phase difference.
are of the same amplitude, and maintain a constant phase difference.
are of the same frequency and amplitude.
Interference of light is evidence that:
the speed of light is very large
light is a transverse wave
light is electromagnetic in character
light is a wave phenomenon
One beam of coherent light travels path P1 in arriving at point Q and another coherent beam travels path P2 in arriving at the same point. If these two beams are to interfere destructively, the path difference P1 - P2 must be equal to
an odd number of half-wavelengths.
zero.
a whole number of wavelengths.
a whole number of half-wavelengths.
What letter do we give to the slit spacing?
w
D
s
Which is the correct equation to work out fringe separation?
w=λsD
w=Dλs
w=sλD
w=λDs
When white light is used, what colour are the outer side of the outer fringes?
Red
Blue
White
