waves

Question 1

what is an transversal wave

Answer 1

ocsillations are perpendicular to the direction of energy transfer

Question 2

what is an longtitudinal wave

Answer 2

oscillations are parallel to the direction of energy transfer

Question 3

what is an oscillation

Answer 3

A wave movement up or down

Question 4

what direction are oscillations in a transverse wave

Answer 4

Perpendicular

Question 5

what direction of oscillations in a longtitudinal wave

Answer 5

parallel

Question 6

what is the equation for wavespeed

Answer 6

wavespeed equals frequency times wavelength

Question 7

What is a wavelength

Answer 7

distance between the same points on two consecutive waves

Question 8

What is an amplitude

Answer 8

distance from the middle line to the maximum displacement , crest or trough

Question 9

What is frequency

Answer 9

the amount of waves that pass a single point per second

Question 10

What is a period

Answer 10

the time taken for each point to completely pass a single point

Question 11

An increase in frequency….

Answer 11

velocity increase

Question 12

wavelength increases…

Answer 12

velocity increases

Question 13

2 Types of transverse waves

Answer 13

. Electromagnetic wave
. Seismic-s waves

Question 14

2 Types of longtitudinal waves

Answer 14

.Sound waves
. Seismic=p waves

Question 15

What are the two types of a longtitudinal wave called

Answer 15

. rarefractions and Compressions

Question 16

What does a wave transfer

Answer 16

Energy

Question 17

What word is used to describe when a wave bounces off a surface

Answer 17

Reflection

Question 18

What type of spectrum do electromagnetic waves form

Answer 18

A countinous spectrum

Question 19

Order the types of electromagnetic radiation from lowest to highest frequency

Answer 19

Radiowaves
Microwaves
Infrared
Visible light
Ultraviolet
X-rays
Gamma-rays

Question 20

How do the speeds of electromagnetic radiation differ in a vaccum and in air

Answer 20

Electromagnetic radiation all travel at the same speed in a vaccum and in air

Question 21

In which directions do waves refract when entering a denser medium

Answer 21

They bend towards the normal
The angle of refraction is less than the angle of incidence

Question 22

In hospital gamma rays are used to…

Answer 22

.Preform medical treatment
. Treat cancer

Question 23

What health affects can ultra violet waves cause…

Answer 23

. Causes skin to age prematurely
. Increase risk of developing skin cancer

Question 24

What health affects can x-rays and gamma-rays cause…

Answer 24

. They are both ionising radiations, so can cause mutations in genes
. They can lead to increase risks of catching various cancers

Question 25

GIve three practical uses for infrared radiation

Answer 25

.Electrical heaters .cooking food .infrared cameras

Question 26

Give three practical uses for Microwave radiation

Answer 26

. Sattelite communications .Cooking food

Question 27

Give two practical uses for radio waves

Answer 27

. television transmission . Radio broadcasts

Question 28

What is used to transmit data really quickly over any large distances , UV light

Answer 28

Optical fibres

Question 29

X-rays,gamma-rays,UV lights are all...

Answer 29

.Ionising radiation .Can cause us harm and damage are cells

Question 30

In a hospital gamma rays are used for..

Answer 30

.medical treatments

Question 31

What do all bodies (objects) emit and absorb

Answer 31

infrared radiation

Question 32

what happens to the quantity of infrared radiation emitted by an object as temperature increases

Answer 32

The hotter the object,the more infrared radiaition it will emit.

Question 33

What is a perfect black body

Answer 33

An object that absorbs all of the radiation that is on it.

Question 34

Why is black body the best possible emitter of radiation

Answer 34

.It absorbs all radiation on it .A perfect absorber of radiation is also a perfect emitter

Question 35

Other than the intensity of radiation emitted , how does increasing the temperature of an object effect its emissions

Answer 35

The wavelength and intensity of any emission is dependant on the objects temperature

Question 36

what is a sound wave

Answer 36

A wave of compression and rarefraction by which sound is propagated in an elastic medium such as air.

Question 37

What is a light wave

Answer 37

a type of electromagnet radiation that can be detected by the eye . it travels as a transverse wave. unlike sound waves light waves do not need a medium to pass through