Use the first image for a and b and the second image for c and d. A screen is placed a distance R = 10m away from a 2-slit setup. Point P on the screen is located 180 mm from the central maximum. The distance between slits is d = 0.1mm. A laser beam is incident on the slits from the left, as shown. With this setup the third bright spot in the interference pattern is exactly at point P. (a) Calculate the wavelength of the laser. (b) Determine the intensity of the light at a point on the screen 140 mm from the central max. Express your answer as a percentage of the intensity of the central max. (c) If instead of the 2 slit setup a screen with a single
Use the first image for a and b and the second image for c and d.
A screen is placed a distance R = 10m away from a 2-slit setup. Point P on
the screen is located 180 mm from the central maximum.
The distance between slits is d = 0.1mm. A laser beam is incident on
the slits from the left, as shown.
With this setup the third bright spot in the interference pattern is exactly
at point P.
(a) Calculate the wavelength of the laser.
(b) Determine the intensity of the light at a point on the screen 140 mm from the central max.
Express your answer as a percentage of the intensity of the central max.
(c) If instead of the 2 slit setup a screen with a single slit is
used, what should the width a of the slit be such that the central
maximum in the diffraction pattern extends to the same point P?
(d) With the width a from (c) determine the intensity of the light at a point on the screen 140 mm from the central max. Express your answer as a percentage of the intensity of the central max.
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