Question

Two narrow slits 0.02 mm apart are illuminated by light from a CuAr laser (λ = 633 nm) onto a screen. a)What is the angle of the first (m = 1) bright fringe?b)If the first fringe is 0.2 cm away from the central fringe, what is the screen distance?c)What is the angle of the first dark fringe?d)What is the angle of the thirtieth bright fringe?e)If I illuminated the slits with a HeNe laser and found an angle for the first bright fringe of 3.3 Degrees, what is the wavelength of the laser?

Answer #1

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Two narrow slits are illuminated by a laser with a wavelength of
578 nm. The interference pattern on a screen located x = 4.50 m
away shows that the third-order bright fringe is located y = 9.10
cm away from the central bright fringe. Calculate the distance
between the two slits.
First you have to calculate the angle of the maximum. Then you
can use the formula for bright fringes of double slits.
Incorrect.
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The screen...

Two narrow slits are illuminated by a laser with a wavelength of
522 nm. The interference pattern on a screen located x = 4.80 m
away shows that the third-order bright fringe is located y = 9.10
cm away from the central bright fringe. Calculate the distance
between the two slits.
The screen is now moved 0.9 m further away. What is the new
distance between the central and the third-order bright fringe?

Two narrow slits are illuminated by a laser with a wavelength of
587 nm. The interference pattern on a screen located x = 5.00 m
away shows that the second-order bright fringe is located y = 9.30
cm away from the central bright fringe.
A.) Calculate the distance between the two slits.
B.) The screen is now moved 2.5 m further away. What is the new
distance between the central and the second-order bright
fringe?

a) Two narrow, parallel slits, separated by a distance of 0.25
mm, are illuminated by a light source whose wavelength is 480 nm.
Calculate the angular separation of the central bright maximum and
the first-order bright fringe.
b) Two narrow, parallel slits, separated by a distance of 0.25
mm, are illuminated by a light source whose wavelength is 480
nm.
(a) Calculate the angular separation
of the central bright maximum and the first-order bright
fringe.
(b) Calculate the linear separation...

Two narrow slits are illuminated by a laser with a wavelength
of 543 nm. The interference pattern on a screen located x = 4.50 m
away shows that the third-order bright fringe is located y = 7.20
cm away from the central bright fringe. Calculate the distance
between the two slits. ("1st order" means m=1, "second order" means
m=2, etc).

Two thin parallel slits that are 0.0117 mm apart are illuminated
by a laser beam of wavelength 620 nm.
(a) On a very large distant screen, what is the total
number of bright fringes (those indicating complete constructive
interference), including the central fringe and those on both sides
of it? Solve this problem without calculating all the angles!
(Hint: What is the largest that sin ? can be?
What does this tell you is the largest value of m?)
____...

Two slits spaced 0.130 mm apart are placed 90.0 cm from a screen
and illuminated by coherent light with wavelength 550 nm. The
intensity at the center of the central maximum is 4.30 × 10-6 W/m2.
What is the distance on the screen between the third bright fringe
and the sixth dark fringe? What is the intensity at a point midway
between the center of the central maximum and the first
minimum?

Two narrow slits 55 μm μ m apart are illuminated with light of
wavelength 620nm n m . The light shines on a screen 1.2 m m
distant.
a) What is the angle of the mm = 2 bright fringe?
b) How far is this fringe from the center of the pattern?

A pair of narrow, parallel slits separated by 0.300 mm is
illuminated by green light (? = 546.1 nm). The interference pattern
is observed on a screen 1.10 m away from the plane of the parallel
slits.
(a) Calculate the distance from the central maximum to the first
bright region on either side of the central maximum.
________________mm
(b) Calculate the distance between the first and second dark
bands in the interference pattern.
________________mm

A double slit interference pattern is created by two narrow slit
spaced 0.025 mm apart on a screen 2 m away from the slits.
a. If the seventh bright fringe on the detector is 10 cm away
from the central fringe, what is the wavelength of light (in nm)
used in this experiment?
b. What is the angle of the diffraction order?

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