Waves And Sound: Conceptual

Earthquake waves can be either transverse or longitudinal. If an earthquake wave is moving to the east, and the ground is moving back and forth along the east-west axis, this is a _____ wave.

If you decrease the distance between successive crests of a wave, this changes

Light from a lamp is shining on a surface. How can you increase the intensity of the light on the surface?

What is a longitudinal wave?

If the period of the oscillator doubles, what happens to the wavelength and wave speed?

If the amplitude of the oscillator doubles, what happens to the wavelength and wave speed?

A 100 Hz sound wave is traveling through the air. If we increase the frequency to 200 Hz, this will _____ the wavelength.

A lens collects light and focuses it into a small spot. This increases the ________ of the light wave.

Consider the point where the two pulses start to overlap. What is the displacement of point O as these pulses interfere?

Why does destructive interference occur when the two pulses overlap instead of constructive interference?

As the pulses interfere destructively there is a point in time when the string is perfectly straight. Which of the following statements is true at this moment?

An open organ pipe (i.e., a pipe open at both ends) of length L0 has a fundamental frequency f0. If the organ pipe is cut in half, what is the new fundamental frequency?

An open organ pipe (i.e., a pipe open at both ends) of length L0 has a fundamental frequency f0. After being cut in half in Part A, the organ pipe is closed off at one end. What is the new fundamental frequency?

An open organ pipe (i.e., a pipe open at both ends) of length L0 has a fundamental frequency f0. The air from the original pipe after being cut in half and closed off at one end is replaced with helium. (The speed of sound in helium is about three times faster than in air.). What is the approximate new fundamental frequency?