Physics Flashcards
What are the two types of waves?
Transverse which oscillates at 90 degrees and Longitudinal waves which travel parallel to the direction of wave travel.
What is the difference between mechanical and electromagnetic waves?
Mechanical waves require a medium while electromagnetic waves do not.
Describe convection, conduction and radiation.
Convection is the process of hot air rising, conduction is the process of heat moving through solids and radiation is the process of heat moving with waves/no medium.
Identify situations where waves transfer energy.
When music is played or someone talks the vibrations from the object travel through the air to the ear drum.
How far does a wavelength go?
From crest to crest.
What is ohm’s law?
Current(amperes) x Resistance(ohms)=Voltage(v) or V=IR
What is the formula for frequency?
t(period) x f(frequency)=1
Why does sound travel quicker through solids?
The molecules in solids are closer together which makes the transmission of the waves/vibrations quicker.
Order the electromagnetic spectrum from highest frequency to lowest?
Gamma rays, X rays, ultraviolet, visible light, infrared, microwaves and radio waves.
What is the formula for the speed of the waves?
V(velocity)=f(frequency)xlamda(wavelength)
Why do we wear dark clothes in winter and light clothes in summer?
Dark colours absorb light and light colours reflect it.
Where in the circuit do the voltmeter and ammeter go respectively?
The voltmeter must be put in parallel and ammeter must be put in series.
What is the law of reflection?
The angle of incidence = angle of reflection.
What is snell’s law?
Incident index sin incident angle= refracted index sin refracted angle
When light enters an object with a higher refractive index what happens to the angle of refraction?
The angle of refraction becomes smaller which therefore makes it go towards the normal of the surface.
