Light of wavelength 540 nm is incident on a slit of width 0.150 mm, and a diffraction pattern is produced on a screen that is 3.00 m from the slit. What is the width of the central bright fringe? (1 nm = 10-9 m)
a. 1.44 cm
c. 2.16 cm
b. 0.720 cm
d. 1.76 cm
C
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The expansion of the Universe is accelerating
a. True b. False Indicate whether the statement is true or false
A neutron in a nuclear reactor makes an elastic head-on collision with a carbon atom initially at rest. (The mass of the carbon atom is 12 times that of the neutron.) What fraction of the neutron's kinetic energy is transferred to the carbon atom?
a. 14.4% b. 28.4% c. 41.4% d. 56.6%
When electrons fill a subshell in which the orbitals have equal energy, the order in which the orbitals are filled is such that
a. a minimum number of electrons has unpaired spins. b. a minimum number of electrons has intrinsic angular momentum. c. a maximum number of electrons has unpaired spins. d. a maximum number of electrons first fills the next energy level. e. the maximum number of electrons has the same set of quantum numbers.
Contrast the speeds of sound and light in watching a flash of lightning, then listening for the thunder to follow
What will be an ideal response?