Science Bowl Practice Questions

Physics - 10

w) plane mirror
x) concave spherical mirror
y) convex spherical mirror
z) all of the above

ANSWER: Z -- ALL OF THE ABOVE (accept: A, B and C)

61.

Short Answer: A quarter of a wavelength is equal to how many degrees of phase?

ANSWER: 90 DEGREES

62.

Multiple Choice: An organ pipe which is open at both ends resonates at its fundamental frequency.
Neglecting any end effects, what wavelength is formed by this pipe in this mode of vibration if the pipe
is 2 meters long?

w) 2 meters
x) 4 meters
y) 6 meters
z) 8 meters.

ANSWER: X -- 4 METERS

63.

Multiple Choice: Whose principle or law states that each point on a wavefront may be considered a
new wave source? Is it:

w) Snell's Law
x) Huygen's Principle
y) Young's Law
z) Hertz's Law.

ANSWER: X -- HUYGEN'S PRINCIPLE

64.

Short Answer: The frequency of a wave is 50 Hertz and its wavelength is 25 meters. What is the
velocity of this wave?

ANSWER: 1250 METERS/SECOND

65.

Multiple Choice: The wave nature of light is demonstrated by which of the following?

w) the photoelectric effect
x) color
y) the speed of light
z) diffraction

ANSWER: Z -- DIFFRACTION

66.

Multiple Choice: The collision between a photon and a free electron was first explained by which of
the following scientists?

w) Einstein
x) Heisenberg
y) Compton
z) Bohr

ANSWER: Y – COMPTON

67.

Short Answer: Besides solid, liquid, and gas, what is the fourth form of matter?

ANSWER: PLASMA