Waves Sound And Light

Question 1

What is a pulse

Answer 1

A single disturbance in a medium

Question 2

What is a transverse pulse

Answer 2

A pulse in which the particles of the medium move at right angles to the direction of motion of the Pulse

Question 3

What is amplitude

Answer 3

Amplitude is the maximum displayment of a particle from its rest (equilibrium) position

Question 5

What is the principle of superposition

Answer 5

This is the algebraic sum of the amplitudes of two pulses that occupy the same space at the same time

Question 6

What is constructive interference

Answer 6

The phenomenon where the crest of one pulse of an app to the crest of another to produce a pulse of increased amplitude

Question 7

Define destructive interference

Answer 7

The phenomena where the crest of one pulse overlaps with the troll of another resulting in a pulse of reduced amplitude

Question 8

What is a transverse wave

Answer 8

This is a wave in which particles of the medium vibrate at right angles the direction of motion of the wave a transverse wave is a succession of transverse pulses

Question 9

What is wavelength

Answer 9

The distance between two successive points in phase

a wavelength must have one trough and crest

Question 10

What is frequency

Answer 10

The number of wave pulses per second

Question 11

What is the time taken for one complete wave pulse defined as

Answer 11

It is defined as.

Question 12

What is a crest

Answer 12

This is the highest point (peak) on a wave

Question 13

What is what is a troll troll

Answer 13

Lowest point on a wave

Question 14

What does it mean when points are in phase

Answer 14

Two points in phase are separated by a whole number multiple of complete wavelength

Question 15

What does it mean when two points are out of phase

Answer 15

These are points that are not separated by home number multiple of complete wavelength

Question 16

What is a longitudinal wave

Answer 16

This is a wave in which the particles of the medium vibrate parallel to the direction of motion of the wave

Question 17

What is a compression

Answer 17

A region of high pressure in a longitudinal wave

Question 18

What is a rerefaction

Answer 18

A region of low pressure in a longitudinal wave

Question 19

How are sound waves created

Answer 19

Sound waves are created by vibrations in a medium in the direction of propagation

the vibration cause a regular variation in pressure in the medium

Question 20

What kind of wave is a sound wave

Answer 20

A longitudinal wave

Question 21

What are echoes

Answer 21

Echoes are reflections of sound waves

Question 22

What is pitch

Answer 22

Pitch the effect produced in the ear due to the sound of a particular frequency

pitch is directly proportional to frequency

Question 23

What is loudness

Answer 23

Loudness is a subjective term describing how strongly years perception of a sound

loudest directly proportional to amplitude

Question 24

What is ultrasound

Answer 24

sounds with a frequency above 20,000 Hz and up to 100,000 Hz are known as ultrasound

Question 25

How can an image be created using ultrasound

Answer 25

When a wave encounters are boundary between two Media, part of the wave is reflected, part of the wave is absorbed and part of transmitted

Question 26

What are some medical benefits and uses of ultrasound

Answer 26

It can be used to check the location and size of a fetus in the womb ultrasound is also used to break up kidney stones so that a patient can post them ultra sound is also used to see how fast the person is blood is growing in arteries and veins