# How Much Do You Know About Mechanical Waves?

15 Questions | Total Attempts: 106  Settings  A sound wave is an example of a mechanical wave and these types of waves are an oscillation of matter and therefore transfer energy through a medium and not through a vacuum. Just how much do you know about mechanical waves? Take up the quiz below and get to test your level of understanding on the topic. All the best!

• 1.
A sound source moves away from a stationary observer.  According to the Doppler Effect, the frequency heard by the observer is
• A.

Lower than the source

• B.

Higher than the source

• C.

The same as the source

• D.

Equal to zero

• 2.
Fiber optics depends on the phenomenon of
• A.

Total internal reflection

• B.

Diffuse reflection

• C.

Polarization

• D.

Dispersion

• 3.
When the mass of a simple pendulum is tripled, the time required for one complete period
• A.

Does not change

• B.

Triples

• C.

Decreases to 1/3 its original value

• D.

Increases to 4/3 its original value

• 4.
The speed of light is fastest in
• A.

A vacuum

• B.

Water

• C.

Glass

• D.

Diamond

• 5.
When light travels from a medium with a higher index of refraction to a medium with a lower index of refraction, the refracted angle
• A.

Is less than the incident angle

• B.

Is greater than the incident angle

• C.

Does not change

• D.

There is no refraction

• 6.
An object is placed 25 cm away from a plane mirror.  The distance from the object to the image is
• A.

25 cm

• B.

50 cm

• C.

0 cm

• D.

10 cm

• 7.
If the frequency of a wave is doubled, the period
• A.

Doubles

• B.

Halves

• C.

Stays the same

• D.

Decreases to 1/4 the original value

• 8.
A light ray parallel to the optic axis hits a converging lens.  After refraction, the ray
• A.

Passes through the focal point on the opposite side of the lens

• B.

Passes through the focal point on the same side of the lens

• C.

Continues its parallel path

• D.

Gets reflected back upon itself

• 9.
A light beam is incident on a mirror at an angle of 35 degrees.  What is the angle of reflection?
• A.

35 degrees

• B.

55 degrees

• C.

45 degrees

• D.

90 degrees

• 10.
Sonar uses what type of sound waves?
• A.

Infrasonic

• B.

Audible sounds

• C.

Ultrasonic

• D.

Subsonic

• 11.
The wavelength of a wave on a rope is 3.5 meters.  If it takes 2 seconds for the wave to complete 1 cycle, what is the wave speed?
• A.

0.57 m/s

• B.

1.75 m/s

• C.

3.25 m/s

• D.

7.0 m/s

• 12.
A beam of light in polystyrene is incident on water at an angle of 42 degrees.  What is the angle of refraction?
• A.

48.6 degrees

• B.

36.7 degrees

• C.

53.1 degrees

• D.

42.7 degrees

• 13.
What is the period of a 2 kg mass oscillating on a spring with a spring constant of 175 N/m?
• A.

0.36 seconds

• B.

0.53 seconds

• C.

0.67 seconds

• D.

0.79 seconds

• 14.
An object is placed 1.5 meters away from a convex mirror with a focal length of  -5 meters.  Where is the image located?
• A.

2.14 meters in front of the mirror

• B.

2.14 meters behind the mirror

• C.

1.15 meters in front of the mirror

• D.

1.15 meters behind the mirror

• 15.
An object is placed 55 centimeters away from a converging lens with a focal length of 30 centimeters.  What are the characteristics of the image?
• A.

Virtual, upright, magnified

• B.

Virtual, inverted, reduced

• C.

Real, inverted, magnified

• D.

Real, upright, reduced

Related Topics Back to top