Diffraction of Waves
Physics ⇒ Waves and Sound
Diffraction of Waves starts at 10 and continues till grade 12.
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See sample questions for grade 12
A water wave with a wavelength of 2 cm passes through a gap of width 1 cm. Will the wave spread out significantly after passing through the gap?
Describe how the pattern changes if the wavelength of light is increased in a single-slit diffraction experiment.
Describe the difference between interference and diffraction.
Describe what is meant by the term 'diffraction grating'.
A laser beam of wavelength 650 nm passes through a slit of width 0.2 mm. Calculate the angle to the first minimum.
A monochromatic light of wavelength 600 nm passes through a slit of width 0.3 mm. Calculate the angle for the first minimum.
A sound wave of wavelength 0.5 m passes through a gap of width 0.5 m. Will significant diffraction occur? Yes or No.
A sound wave passes through a doorway and spreads out into the next room. This is an example of which phenomenon? (1) Reflection (2) Refraction (3) Diffraction (4) Absorption
A sound wave passes through a doorway and spreads out into the next room. This is an example of which phenomenon? (1) Reflection (2) Refraction (3) Diffraction (4) Absorption
Which of the following best explains why we can hear someone speaking around a corner but cannot see them? (1) Sound waves diffract more than light waves (2) Light waves diffract more than sound waves (3) Both diffract equally (4) Neither diffract
Which of the following factors increases the amount of diffraction observed? (1) Wavelength increases (2) Wavelength decreases (3) Slit width increases (4) Slit width decreases
Which of the following is a necessary condition for observing significant diffraction? (1) Wavelength much larger than slit width (2) Wavelength much smaller than slit width (3) Wavelength comparable to slit width (4) Wavelength equal to amplitude
Fill in the blank: Diffraction effects are most noticeable when the size of the obstacle or opening is ________ to the wavelength of the wave.
Fill in the blank: The angular width of the central maximum in a single-slit diffraction pattern is ________ as the slit width decreases.
Fill in the blank: The central maximum in a single-slit diffraction pattern is ________ than the other maxima.
Fill in the blank: The equation for the position of the first minimum in single-slit diffraction is a sinθ = ________.
A sound wave of wavelength 0.5 m passes through a gap of width 0.5 m. Will significant diffraction occur? Yes or No.
If the wavelength of a wave is much smaller than the width of a slit, will significant diffraction occur? Yes or No.
True or False: Diffraction can only occur with sound waves, not with light waves.
True or False: Diffraction is a property unique to electromagnetic waves.
