What determines the smallest angular separation that two objects can have and, ideally, show up in a photograph as two separate objects?
a. How far away the objects are.
b. The shutter speed of the camera.
c. The size of the opening that lets the light into the camera lens and the wavelength of the light.
d. Just the wavelength of the light.
e. Just the size of the opening that lets in the light into the camera.
c
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Light is reflecting off a wedge-shaped thin piece of glass producing bright and dark interference fringes. If a certain location has a bright fringe, a nearby point will have a dark fringe if the thickness of the glass increases by:
a. 1/8 of a wavelength of the light. b. 1/4 of a wavelength of the light. c. 1/2 of a wavelength of the light. d. one wavelength of the light.
You ride on an elevator that is moving upward with constant speed while standing on a bathroom scale. The reading on the scale is
A) equal to your true weight, mg. B) more than your true weight, mg. C) less than your true weight, mg. D) zero. E) could be more or less than your true weight, mg, depending on the value of the speed.
How much water at 20 degrees Celsius is needed to melt 500 grams of ice at 0 degree Celsius?
a. 500 grams b. 1000 grams c. 1500 grams d. 2000 grams
If F = 5.0 N, what is the magnitude of the force exerted by block 2 on block 1?
A. 17 N B. 19 N C. 21 N D. 23 N E. 5.0 N