A single-slit diffraction pattern is produced from a light source of wavelength 580 nm. The light goes through a single slit and onto a screen 1.0 m away. The first dark fringe is 5.8 mm from the central bright fringe. What is the slit width? (1 nm = 10-9 m)
a. 0.12 mm
c. 0.081 mm
b. 0.24 mm
d. 0.10 mm
D
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Photon energies and wavelengths are _________related to each other.
Fill in the blank(s) with the appropriate word(s).
A concave mirror has a focal length of 20 cm. What is the position (in cm) of the resulting image if the image is inverted and four times smaller than the object?
a. 15 b. 25 c. 50 d. 100 e. ?15
Suppose a Young's experiment is carried out in air, and then, in a second experiment, the apparatus is immersed in water. In what way does the distance between bright fringes change?
1.They move further apart. 2.They move closer together. 3.There is no change.
The cluster method (motions of galaxies in a cluster of galaxies) can be used to determine the cluster's mass
a. luminosity. b. distance. c. mass. d. diameter. e. age.