In a Young's experiment, the paths from the slits to a point on the screen differ in length, causing destructive interference at the point. Which of the following path differences would cause this destructive interference?
a. 3l/2
c. 5l
b. 4l
d. None of these choices.
A
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Compare the energy and speed of infrared and visible light. Which of the following statements is true?
A) Infrared light has higher energy, and moves faster. B) Visible light has higher energy, and moves faster. C) Visible light has higher energy, but the same speed. D) Infrared light has higher energy, but the same speed.
A beam of white light goes through dispersion in a prism. The color that bends the most is
A) violet. B) yellow. C) red. D) orange. E) green.
The coefficient of static friction for the tires of a race car is 0.950 and the coefficient of kinetic friction is 0.800. The car is on a level circular track of 50.0 m radius on a planet where 
compared to Earth's 
. If the car is to be able to travel at the same speed on the planet as on Earth, the radius of the track on the
planet must be ____ times as large as the radius of the track on Earth. A. 0.250 B. 0.500 C. 1.00 D. 2.00 E. 4.00
An astronaut stands by the rim of a crater on the moon, where the acceleration of gravity is 1.62 m/s2 To determine the depth of the crater, she drops a rock and measures the time it takes for it to hit the bottom
If the depth of the crater is 120 m, how long does it take for the rock to fall? A) 3.04 s B) 12.2 s C) 29.3 s D) 32.1 s E) 37.5 s