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WorksheetsWaves 5 - Diffraction Grating
Total questions: 10
Worksheet time: 11mins
When the crest of one wave passes through the trough of another wave, ______ takes place.
constructive interference
destructive interference
diffraction
resonance
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
For destructive interference, the path difference is:
odd number of half wavelengths
even number of half wavelengths
whole number of wavelengths
even whole number of wavelengths
Constructive interference happens when two waves are:
out of phase.
zero amplitude.
in phase.
Two waves with phase difference 180° have resultant of amplitude
one.
zero.
same as the single wave.
doubles the single wave.
Extra distance travelled by one of waves compared with other is called
path.
displacement.
phase difference.
path difference.
Monochromatic light of wavelength 590 nm is incident normally on a plane diffraction grating having 4 × 105 lines m−1 . An interference pattern is produced.
What is the highest order visible in this interference pattern?
2
3
4
5
Light of wavelength λ is incident normally on a diffraction grating of slit separation 4λ.
What is the angle between the second order maximum and third order maximum?
14.5°
18.6°
48.6°
71.6°
The grating has a slit separation of 2.00 μm.
What is the angular separation (θ2 – θ1) between the first and second order maxima of the yellow light?
17.5°
36.9°
19.4°
54.3°
