Monochromatic light falls on two very narrow slits 0.048 mm apart. Successive fringes on a screen...
Homework Answers
The concepts used to solve this problem are diffraction, double slit interference, wavelength and frequency.
Use the expression for slit separation, distance between the slit and screen, fringe separation to find the wavelength.
Use the relation between frequency, wavelength and speed of light to find the frequency.
Interference is a physical occurrence in which two waves superpose to form a resultant wave of greater, lower or same amplitude.
The expression for two slit interference,
Here, the slit separation distance is
, the distance between screen and the slit is 
, the fringe separation is
and the wavelength of the incident light is 
.
The two slit interference expression is,
Rearrange the expression to get 
.
Substitute 
for 
, 
for 
and 
for 
.
The expression relating of wavelength, frequency and speed of light is,
Rearrange the above expression to get the frequency.
Substitute 
for
and 
for 
.
The wavelength of the light is
.
The frequency of the light is 
.
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Monochromatic light falls on two very narrow slits 0.048 mm apart. Successive fringes on a screen...
Monochromatic light falls on two very narrow slits 0.044 mm apart. Successive fringes on a screen...
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Monochromatic light falls on two very narrow slits 0.049 mm apart. Successive fringes on a screen...
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