A light ray is reflected by two mirrors that are perpendicular. The new direction of the ray is
A)
180° from the original direction.
B)
135° from the original direction.
C)
45° from the original direction.
D)
between 90° and 180° from the original direction.
E)
90° from the original direction.
A
You might also like to view...
A fixed focus camera has a focal length of 35.0 mm. How far must the lens be moved in order to change focus from an object that is 20.0 m away to one that is 3.0 m away?
A. 0.34 mm B. 0.41 mm C. 0.35 mm D. 0.47 mm
A nonrelativistic electron and a nonrelativistic proton have the same de Broglie wavelength. Which of the following statements about these particles are accurate? (There may be more than one correct choice.)
A) Both particles have the same speed. B) Both particles have the same kinetic energy. C) Both particles have the same momentum. D) The electron has more kinetic energy than the proton. E) The electron has more momentum than the proton.
A pair of sound wave sources interfere destructively at a point that is 3?4 of the way from one speaker to the other. If the speed of sound is 343 m/s, and the sound waves are emitted at 880 Hz, which of the following is a possible distance between the two speakers?
A. 2.7 m B. 0.58 m C. 1.16 m D. 1.9 m E. 77 cm
The equation 
is the same as
A.
B.
C.
D.
E.
