SQA Advanced Higher Physics Area 2 Quanta and Waves overview quiz quiz

That light is purely a wave

That light energy is quantised into photons

That light has no momentum

That brighter light always ejects faster electrons

Its charge

Its temperature

Its momentum

Its potential energy

Both can be known exactly at the same time

Neither can ever be measured

They cannot both be known precisely at the same time

Their product is always zero

A particle gaining energy from a barrier

A particle passing through a barrier it classically could not cross

A particle being reflected by every barrier

A particle losing all its energy at a barrier

Sound waves from the Sun

A continuous stream of charged particles flowing from the Sun

Light emitted by the Sun

The Sun's magnetic field

It increases the speed

It decreases the speed

It does not change the speed, only the direction

It stops the particle

The incoming particles themselves glow

Charged particles excite atmospheric atoms, which emit light as they de-excite

Sunlight reflects off the upper atmosphere

The Earth's core emits light

a = omega squared y

a = minus omega squared y

a = minus omega y

a = omega y squared

At the extremes of the motion

At the centre (equilibrium position)

Everywhere equally

Only when damped

It increases the amplitude

It reduces the amplitude over time as energy is lost

It changes the mass

It has no effect on energy

One wavelength

Half a wavelength

A quarter of a wavelength

Two wavelengths

By one wave reflecting off a node

By two waves of the same frequency and amplitude travelling in opposite directions

By a single travelling wave slowing down

By two waves of different frequencies

An odd number of half-wavelengths

A whole number of wavelengths

A quarter of a wavelength

Any path difference at all

Division of amplitude

Division of wavefront

Polarisation

Diffraction only

It changes the wavelength permanently

It introduces an extra half-wavelength phase change

It absorbs all the light

It reverses the direction of travel only

Because they travel faster

Because they vibrate perpendicular to their direction of travel

Because they carry more energy

Because they have no frequency

I = I0 cos theta

I = I0 cos squared theta

I = I0 sin theta

I = I0 tan theta

It is unpolarised

It is completely plane polarised

It is totally absorbed

It is circularly polarised