P:6 Waves Paper 2 Flashcards
What Does a Wave Travel Through and Write a Definition of Medium?
- When a wave travels through a medium the particles of the medium vibrate.
- A Medium is whatever the wave is travelling through.
What Do particles transfer when they vibrate?
- When particles vibrate they transfer energy.
Write a Definition of The Amplitude?
- Amplitude is the maximum displacement from the waves resting position.
Write a Definition of the Wavelength and How do you work out the wavelength?
- The wavelength is the distance from 1 point on a wave to the same point.
- Its from 1trought of a wave to the other trough.
Write a Definition of Frequency and what’s it measured in?
- Frequency is the number of vibrations per second made by the wave.
- Frequency is Measured in Herts (Hz) 1 Hz is 1 wave per second.
Write a Definition of a Period?
- Period is the amount of time it takes 1 complete wave to pass a certain point.
Name the 2 Different types of waves?
- 1) Longitudinal Waves.
- 2) Transverse Waves.
Write a Definition of a Ray?
- A Ray is a straight line showing the path along which a wave moves.
What are the Main uses of Transverse Waves and How fast do transverse waves travel?
- Main Uses:Light,Radio,Microwaves and Gamma waves.
- Transverses Waves travel 300 million m/s
What Happens in a Transverse Waves and How Do they move in a direction?
- In Transverse waves Particles vibrate in a direction perpendicular to the direction of propagation of the wave.
What are formed in transverse Waves and where do they form?
- Peaks and Troughs are formed in these waves.
- These waves are formed on the surface of solid and liquids.
What’s The main use of longitudinal waves and how do particles travel?
- The Main use: Sound.
- Particles vibrate in a direction Parallel to the direction of propagation of the wave.
What is formed in longitudinal waves and where is it formed?
- Compression and rarefaction is formed.
- Longitudinal waves are formed in solids liquids and gases.
What’s the equation of a period of a wave?
- 1 ÷ Frequency
What’s the equation of Wave speed?
- Frequency (Hz) x Wavelength (m)
In 4 Steps how do You Calculate waves on water (PRATICAL)
- 1) Place a ruler onto a piece of card underneath the tank and turn on the power supply.
- 2) Measure the distance of 10 consecutive waves.
- 3) Divide this number by 10 to calculate 1 wave length.
- 4) To calculate Frequency you would time how many waves pass a point a second.
In 5 Steps how do you calculate waves in air (PRATICAL)
- 1) Measure the Length of the string at the second harmonic this will be 1 wavelength.
- 2) Set The frequency so jest 1 wave is on the string.
- 3) Record the frequency.
- 4) Increase the frequency until 2 waves arrear.
- 5) Repeat once more.
Write a Definition of Electromagnetic Spectrum?
- Electromagnetic spectrum is a Continuous spectrum of all the possible wavelength of Electromagnetic waves.
What Do electromagnetic waves Transfer and what type of waves are electromagnetic waves?
- Electromagnetic waves transfer energy from a sauce to an absorber.
- Electromagnetic Waves are transverse waves.
What Do all electromagnetic waves travel at and what are they grouped on?
- All electromagnetic Waves travel at the same speed.
- They are grouped based on frequency and wavelength.
Name the 7 different types of waves in the electromagnetic spectrum in order?
- 1) Radio waves.
- 2) Microwaves
- 3) Inferred waves.
- 4) Visible Light.
- 5) Ultra violent Radiation.
- 6) X-Ray
- 7) Gamma radiation.
What’s The mnemonic To Remember the 8 common uses of Radio waves?
- Big - Broadcasting (Radio ,Tv)
- Satellites - Satellites (Communication, GPS , Internet)
- Can - Communication (Mobile Phones Wi-fi , Bluetooth)
- Help - Healthcare (MRI Scanners)
- Make - Military (Radar)
- Space - Space (Astromancy and space probes)
- Really - Remote control (Garage doors and remote control)
- friendly - Factories (Industrial heating)
- Big Satellites can help make space really friendly
Name all The uses of Microwaves?
- Microwaves are used to heat up food and water.
- Its also used in radar, Telephone and other signals.
Name All the uses of Infrared Radiation?
- Transmits heat from sun, Radiators and fires.
- And Used in heat redaction to warm up your house.
Name all the 2 uses of Visible Light?
- Visible light makes things able to be seen.
- Its Also Used in fibre optic Communications
Name all the Uses of Ultraviolent?
- Absorbed By the skin and used in Fluorescent tubes.
Name all the uses of X-Rays?
- X-rays are used to view inside of bones and objects.
Name all the uses of Gamma rays?
- Gamma Rays are Used in medicine for killing cancer cells.
What’s The mnemonic to Remember the Electromagnetic spectrum?
- Rabbits - Radio Waves
- Mate - Microwaves
- In - Infrared
- Very - Visible light
- Unusual - Ultra Violent
- expensive - X-Rays
- Gardens - Gamma rays
- Rabbits mate in very unusual expensive Gardens.
Write a Definition of a Ray Diagram?
- a Ray diagram is a diagram that shows the path of light waves.
What’s the mnemonic to remember all the colures in visible light in order?
- Richard - Red
- Of - Orange
- York - Yellow
- Gave - Green
- Battle - Blue
- In - Indigo
- Vain - Violent
- Richard of York gave Battle in vain
Name 3 Things That Increases as We move Further into the electromagnetic spectrum?
- 1) Higher Frequency
- 2) Low/short wavelength
- 3) It Becomes More dangerous
What colures are good reflectors of IR and Which colures are good absorbers and good emitters of IR?
- White is a Good reflector of IR.
- Black is a good absorbers and a good emitter of IR.
In 4 Steps How do You Figure IR Absorption (PRATICAL)
- 1) Fill the Leslie Cube with hot water.
- 2) Wait for 2 minutes.
- 3) Use an infrared thermometer to measure all 4 surface temperatures.
- 4) Results - 1) Matt black (Hottest)
- 2) Shiny black
- 3) White
- 4) Sliver (Coolest)
Explain how Gamma rays are used to treat cancer?
- Gamma Rays are used to treat can cancer because it destroys the cancers DNA.
Why are gamma rays targeted at tumours from different angles during Radiotherapy?
- Because to minimise harm to health tissues.
Apart from cancer treatment how else are gamma rays used in Medicine?
- Gamma Rays are also used in Sterilisation and can kill bacteria and other pathogens.
What Is the main purpose of a CT Scan and how is it different from a Standards X-Rays?
- The main Purpose of CT scans is that it can provide a detailed cross-section of the body to Intertitle and tumours.
Describe one advantage of using X-rays for medical imaging?
- It Allows them to see bones and problems in the Skelton.
How is UV light used to ensure cleanliness in hospitals?
- It is used to kill microorganism on surgical instruments, Hospital surfaces and in water treatment systems.
What Skin Conditions can UV Light help to treat and how does it work?
- Eczema and Psoriasis can be used by UV light To Reduce Inflammation and slowing skin cell growth.
Why Must UV Light be carefully controlled in medical application?
- Because Prologue exposure to UV Light can damage living tissues.
