Physics test on waves (sound and light)

What is the law of reflection

The angle of reflection = the angle of incidence

All angles are measure between the ray and the …

Normal

How do we see the moon

Reflection

What is a normal

A lone which is at 90 degrees to another line or surface it is also ‘perpendicular to’

What are the secondary colours

Cyan, magenta and yellow

What are the primary light colours

Blue, green and red

What is dispersion

The separation of white light into all light colours (can be seen using a prism)

What does a coloured filter do

Transmits light only of its own colour

Describe the path of the light as it travels towards and through the block

It goes towards the normal bug when it goes through it bends away from the normal

Where the ray hits the glass, the angle between the ray and the normal is called the angle of …

Incidence

When the ray bends the change of direction of the ray is called…

Refraction

The angle between the ray, after it has entered the glass, and the normal is called the angle of…

Emergence

When the ray passes out of the glass block and into the air (EMERGENT RAY) it is travelling…to the incident ray

Parallel

What is refraction

The bending of light which occurs when it enters a different material

Light travels at different…in different media, eg it is …. In glass ware than it’s in a vacuum

Speeds, slower

Media in which light travels slower is said to be…

Optically dense

What is refraction

The bending of light as they pass from one medium to another

What is refraction caused by

A change in speed

What does luminous mean

Gives off light

What is a transverse wave

The particles vibrate at right angles to the direction of energy transfer

What is a longitudinal wave

The particles vibrate parallel to the direction of energy transfer

How do you increase the loudness of a wave

Increase the amplitude

How to increase the pitch

decrease the time for one wave

What instrument creates this shape of wave

Piano

What instrument does this shape wave come from?

Trumpet

What are 4 examples of transverse waves

Earthquake S waves, water waves, EM waves, waves on a string

What are 2 examples of longitudinal waves

Sound waves, earthquake P waves

How do you work out the frequency of a wave

Frequency = number of waves/ time

When we look at a sound wave on an oscilloscope, does it appear as a longitudinal or a transverse wave?

Transverse

How do you work out the wave speed

Wave speed = frequency x wavelength