If you view a distant light source through a narrow gap between your fingers, you will see [if you do the experiment properly]
A) Donald Duck.
B) alternating bright and dark lines running perpendicular to your fingers, due to interference between light waves.
C) alternating bright lines and dark lines running parallel to your fingers, due to interference between light waves.
D) the entire gap is dark, due to destructive interference between light waves.
E) the entire gap is bright [or light], due to constructive interference between light waves.
C
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The figure shows an image of our galaxy, the Milky Way, at dust-penetrating wavelengths. It can be classified as which one of the following galactic types?
A. spiral B. irregular C. elliptical D. red giant
An astronaut has landed on another planet and conducts an experiment to determine the acceleration of gravity on that planet. She uses a pendulum 0.640 m long and determines that the period of oscillation is 2.60 s
What is the acceleration of gravity on that planet? A) 4.85 m/s2 B) 1.66 m/s2 C) 3.74 m/s2 D) 2.39 m/s2 E) 9.81 m/s2
Negatively charged subatomic particles are known as:
a. neutrons b. protons c. electrons d. elements e. atoms
If a wave has a frequency of 6 Hz, it has a period of
a. 1/6 s. b. 6.5 s. c. 6 s. d. 3 s.