Interference of Light
Physics ⇒ Light and Optics
Interference of Light starts at 11 and continues till grade 12.
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See sample questions for grade 11
Describe the difference between constructive and destructive interference.
Describe the effect of increasing the slit width in Young's double slit experiment on the visibility of fringes.
Explain why soap bubbles show different colors when viewed in white light.
Explain why the interference pattern is not observed when the two slits are illuminated by two different lamps.
Explain why the width of the central maximum in a double slit interference pattern is the same as that of other bright fringes.
Explain why two sodium lamps cannot be used as coherent sources for interference experiments.
If the distance between the slits in Young's experiment is halved, what happens to the fringe width?
If the intensity at a point in an interference pattern is zero, what can you say about the phase difference between the two waves at that point?
If the intensity of each of two interfering waves is I, what is the maximum intensity at a point of constructive interference?
If the phase difference between two interfering waves is π, what type of interference occurs?
If the screen in Young's double slit experiment is moved farther from the slits, what happens to the fringe width?
If the wavelength of light used in an interference experiment is changed from red to blue, what happens to the fringe width?
In a double slit experiment, the distance between the slits is 0.2 mm, the screen is 1 m away, and the wavelength of light is 500 nm. Calculate the distance between the first and third bright fringes.
In a thin film interference, what causes the phase change upon reflection?
In Young's double slit experiment, the distance between the slits is 0.5 mm and the screen is 2 m away. If the wavelength of light used is 600 nm, calculate the fringe width.
In Young's double slit experiment, what happens to the fringe width if the wavelength of light is doubled?
State one application of the interference of light in daily life or technology.
State the principle of superposition of waves.
The intensity at a point in an interference pattern is given by I = I₁ + I₂ + 2√(I₁I₂)cosφ. What does φ represent?
The path difference between two waves is 1.5λ. Will the interference at that point be constructive or destructive?
