A light beam with wavelength 500 nm is reflected constructively from a thin layer of oil having index of refraction 1.25
The oil floats on the top of water of index of refraction 1.33. What is the minimum thickness of the layer of oil?
A) 100 nm
B) 150 nm
C) 175 nm
D) 200 nm
E) 225 nm
D
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Photography Optics: A slide projector needs to focus the image of a 24.0-mm × 36.0-mm slide onto a square screen 1.50 m on each side. You want to fill the screen as completely as possible without any of the image falling beyond the screen. Due to space constraints in the projector, the slide must be placed 10.5 cm from the lens.(a) What magnification does the projector produce?(b) How far from the lens should the screen be placed?(c) What focal length projector lens is needed?
What will be an ideal response?
For a satellite in orbit around Earth, the product of its speed times the distance from the center of Earth has the same value when the satellite is at the perigee, its closest approach to Earth, and at the apogee, its furthest point from Earth
Is the product the same at other points on the orbit? Why?
Although antimatter is an interesting theoretical idea, there is no evidence that it actually exists
Indicate whether the statement is true or false
A rock is thrown straight up with an initial velocity of 20.0 m/s. Ignore energy lost to air friction. How high will the rock rise?
a. 41.0 m c. 20.4 m b. 10.2 m d. 11.5 m