GCSE-Waves-EMSpectrum-Sound Flashcards
Wave Equation
v = f λ
For echo-location, the distance to the reflecting surface is equal to…?
1/2 x speed of sound x echo time
The member of the electromagnetic spectrum with the shortest wavelength
Gamma
The member of the electromagnetic spectrum with the second-shortest wavelength
X-rays
The member of the electromagnetic spectrum with the next longest wavelength after X-rays
Ultra-Violet
The fourth member of the electromagnetic spectrum in order of increasing wavelength
Visible Light
The member of the electromagnetic spectrum with the next longest wavelength after Visible Light
Infra-Red
The member of the electromagnetic spectrum with the second-longest wavelength
Microwaves
The member of the electromagnetic spectrum with the longest wavelength
Radio
Travelling waves transfer …?… from one point to another
energy
A wave in which the direction of wave motion is perpendicular to the direction of particle vibration is a …?… wave.
transverse
A wave in which the direction of wave motion is parallel to the direction of particle vibration is a …?… wave
longitudinal
Sound is a …?… wave.
longitudinal
The Law of Reflection says that the angle of incidence …?… the angle of reflection.
equals
The higher the …?… of electromagnetic radiation, the more damaging to the body it is likely to be.
frequency
Ultrasound is sound with a frequency …?
greater than 20 000 Hz
Ultrasound is used in industry to detect …?
defects in metal.
Ultrasound is used in medicine to measure …?
foetal head diameter.
Are water waves transverse or longitudinal?
Transverse
Are electromagnetic waves transverse or longitudinal?
Transverse
What is the name given to the number of complete waves passing a given point (or created) per second?
Frequency
The unit for frequency.
Hertz (Hz)
What is the name given to the distance from one crest (or trough or compression or rarefaction) to the next?
Wavelength
How to draw diagrams showing reflection or refraction of plane waves.
Draw rays first, obeying the usual rules for reflection or refraction. Then draw the waves perpendicular to the rays, ensuring wavelength is unchanged for reflection.
