Author Question: When a beam of light, which is traveling in air, is reflected by a glass surface, there is A) ... (Read 84 times)

joblessjake · **on:** Jul 29, 2018

When a beam of light, which is traveling in air, is reflected by a glass surface, there is

A)

a 90 phase change in the reflected beam.
B)

no phase change in the reflected beam.
C)

a 180 phase change in the reflected beam.
D)

a 60 phase change in the reflected beam.
E)

a 45 phase change in the reflected beam.

Question 2

Two toy cars (16 kg and 2.0 kg) are released simultaneously on an inclined plane that makes an angle of 30 with the horizontal. Make a statement which best describes their acceleration after being released.

A)

The 16-kg car accelerates 8 times faster than the 2.0-kg car.
B)

The 16-kg car accelerates 2 times faster than the 2.0-kg car.
C)

The 2.0-kg car accelerates 8 times faster than the 16-kg car.
D)

The 2.0-kg car accelerates 2 times faster than the 16-kg car.
E)

Both cars accelerate at the same rate.