Unit 4 Exam Prep

Which of the following is true for electromagnetic waves but NOT for mechanical waves?

• Can travel through gas, liquid, and solid

• Can travel through vacuum

• Transfer energy

• Can be transverse

Which term refers to the time required for one complete wave?

• period

• frequency

• wavelength

• wavespeed

Which is NOT a part of a transverse wave?

• Crest

• Trough

• Equilibrium

• Principal Axis

Which of the following DOES NOT result in a wave with a lower energy?

• higher wavelength

• lower wavelength

• lower frequency

• lower amplitude

Which statement about sound waves is false?

• The human ear typically hears frequencies between 20 Hz and 20,000 Hz

• Higher amplitudes sound louder

• Sound waves transfer energy through vacuum

• Sound waves transfer energy through vibration

The image shows standing waves in a rope that is fixed at both ends. Which harmonic is depicted?

• Second Harmonic

• Fourth Harmonic

• Fifth Harmonic

• Sixth Harmonic

The image is of standing waves in a closed tube. The red dots are called what?

An older lady pulled up to Kroger on Saturday in a Slingshot, bumping some oldies. When she passed, it seemed like the pitch of her music changed because the frequency of her music was higher as she was getting closer than when she was getting further away. What is this effect known as?

Which of the following statements about the electromagnetic spectrum is false?

• Radio waves have the greatest wavelength.

• Gamma rays have the greatest frequency

• Infrared waves have more energy than visible light.

• Ultraviolet rays have more energy than visible light.

A light is shown on a mirror at an angle of incidence of 40 degrees. What is its angle of reflection?

• 40 degrees

• 50 degrees

• 140 degrees

• 20 degrees