Double-Slit Interference: A pair of narrow slits that are 1.8 mm apart is illuminated by a monochromatic coherent light source. A fringe pattern is observed on a screen 4.8 m from the slits. If there are 5.0 bright fringes/cm on the screen, what is the wavelength of the monochromatic light?
A. 550 nm
B. 600 nm
C. 650 nm
D. 700 nm
E. 750 nm
Answer: E
You might also like to view...
Classify the following statement as a characteristic
(a) of electric forces only, (b) of magnetic forces only, (c) of both electric and magnetic forces, or (d) of neither electric nor magnetic forces. The force is proportional to the magnitude of the charge of the object on which the force is exerted.
1.electric forces 2.magnetic forces 3.both electric and magnetic forces 4.neither electric nor magnetic forcesSuppose Earth collapsed down to one-tenth of its present radius, while retaining all of its present mass. Compared to your present mass, your mass would be
A) reduced by a factor of 100. B) unchanged. C) reduced by a factor of 10. D) increased by a factor of 10. E) increased by a factor of 100.
A plot of the temperature versus the energy per kg added to a piece of ice as it goes from below freezing at ?10°C to becoming steam at 110°C consists of straight lines, some horizontal and some with an upward slope. What do the upward slopes represent?
a. specific heats b. reciprocals of specific heats c. latent heats d. reciprocals of latent heats
The amplitude of a system moving with simple harmonic motion is doubled. The total energy will then be
A. 4 times as large. B. 3 times as large. C. 2 times as large. D. the same as it was. E. half as much.