Progressive Waves (Part 2)

RECAP:

The separation XY on the graph represents the ………(1)…………… of the wave.

X and Y have equal ……………(2)……………

Which words correctly complete gaps 1 and 2?

RECAP:

What is phase difference between X and Y?

The cathode-ray oscilloscope (c.r.o) is used to display the trace from a sound wave. The time base is set at 10 ms per division.

What is the period of the signal shown?

A microphone is connected to a cathode-ray oscilloscope (CRO). A sound wave of constant

frequency is detected by the microphone. The screen of the CRO is shown.

The time-base is set at 1.0 ms cm^–1.

What is the frequency of the sound wave?

The Y-input terminals of a cathode-ray oscilloscope (c.r.o.) are connected to a supply of

amplitude 5.0 V and frequency 50 Hz.

The time-base is set at 10 ms per division and

the Y-gain at 5.0 V per division.

Which trace is obtained?

The wave frequency is 100 Hz. Find the wave speed.

From these graphs, determine the speed of the wave

A sound wave has a speed of 330 ms^-1 and a frequency of 50 Hz.

What is a possible distance between two points on the wave that have a phase difference of 60°

The intensity of a wave is equal to the wave power (P ) divided by the _______.

A wave of amplitude a has an intensity of 3.0 Wm^–2.

What is the intensity of a wave of the same frequency that has an amplitude 2a?

A wave of amplitude A has an intensity I.

After passing through a certain medium, the wave has a new intensity of ¼ I

What is the new amplitude of the wave?

What is the ratio of $$\frac{intensity\ of\ wave\ X}{intensity\ of\ wave\ Y}$$