NEW
Font size
WorksheetsInterference
Total questions: 10
Worksheet time: 10mins
How many waves we need to occur interference?
1
only 2
2 or more
A student creates interference pattern by using two coherent waves with the same amplitude A. What is the amplitude of resultant wave produced by constructive interference?
A
0
2A
A/2
The effect of a double slit on monochromatic light is observed by set up in the diagram.
Interference fringes are seen on the screen.
Which of the following changes would increase the distance between the adjacent fringes?
decrease the width of each slit
move the screen closer to the double-slit
use light of a higher frequency
decrease the distance between two slits
Certain circumstances will produce visible interferences pattern from two light sources.
Which of the following conditions will enable interferences pattern to be seen?
Using incoherent sources
Using sources have the same amplitude
Using sources have the same frequency, wavelength and constant phase difference.
Using blue light sources
Monochromatic light produces interference fringes with separation of x on the screen, distance from two slit the screen is D, slits separation is a.
The student double D and a.
What would be the new x ?
x
2x
4x
x/2
A double slit interference experiment is performed using monochromatic light of wavelength 𝜆. The centre of the observable pattern is a bright fringes.
What is the path difference between two waves which interference to give the second dark fringe from the center?
0.5𝜆
1.5𝜆
2.5𝜆
3.5𝜆
Interference maxima produced by a double source are observed at a distance of 1 m from the sources. In which one of the following cases are the maxima furthest apart?
red light of wavelength 600nm from sources 3 mm apart.
sound of wavelength 70mm from sources 60 mm apart
red light of wavelength 400nm from sources 10 mm apart.
surface water of wavelength 50mm from sources 200 mm apart
Two generators are placed at point S and R to produce water waves with an identical wavelength. At point T, both waves have the same amplitude. As students walks between S to T, she notices that the loudness of the sound increase then decrease repeatedly.
What is the wavelength of the waves when the wave generators are in phase and in amplitude at T is zero?
6 cm
4 cm
3 cm
2 cm
The equipment was set up as in the diagram to investigate the interference of a double slit.
Which of the following changes would increase the fring spacing?
decreasing the wavelength of the light
decreasing y
decreasing x
decreasing w
A student is investigating the interference of waves. The set up coherent waves produced at points S and T and travel outwards in all directions.
The line XY is halfway between S and T and perpendicular to the joining S and T. The distance XY is much greater than the distance ST.
Which line or lines can we see the interference?
WZ only
XY only
both XY and WZ
neither XY or WZ
