GCSE Physics, 4.6- Waves.

Describe the motion of transverse waves. [3 marks]

Oscillate perpendicular to the direction of energy transfer.

Describe the motion of longitudinal waves. [3 marks]

Oscillate parallel to the direction of energy transfer.

Describe how sound waves transmitted from one medium to another. [1 mark]

Particle vibrate.

What is range of human hearing. [1 mark]

20 Hz to 20000 Hz.

Fill the gap with word below.

As the wave’s frequency increase, the pitch will

____________ .

As the wave’s amplitude increase, the sound will

____________ .

higher, lower, quieter, louder.

• As the wave’s frequency increase, the pitch will higher.

• As the wave’s amplitude increase, the sound will louder.

What is meant by ‘ultrasound’. [1 mark]

Soundwave with a frequency that is higher than upper limit of human hearing.

Describe how ultrasound is used for medical and industrial imaging. [2 marks]

• Produce image of organ.

• Detect hidden defect.

What is meant by ‘S wave’. [3 marks]

A seismic transverse wave that only travel through solid.

What is meant by ‘P wave’. [3 marks]

A seismic longitude wave that travel through both solid and liquid.

Which wave is faster. [1 mark]

P wave or S wave.

P wave

What does a concave do. [1 mark]

Spread out light.

What does a convex do. [1 mark]

Focus the light.

What is the diffuse reflection. [2 marks]

Reflection on rough surface which does not produce image.

What is the specular reflection. [2 marks]

Reflection on smooth surface which produce image.

Explain what happen when white light pass through red filter. [2 marks]

• Filter absorb all the colour of visible light apart from red.

• Only red visible light transmitted through the filter.

Describe the difference of transparent object and translucent object. [2 marks]

• Can see through transparent object easily.

• Can’t see through translucent object clearly.

What is meant by ‘opaque’. [1 mark]

Object that we cannot see through at all.

Explain why blue object appear blue. [2 marks]

• Blue object absorb all light apart from blue.

• Blue light is reflected.

Explain why a hot metal produce light. [2 marks]

• Hot object will emit radiation that has shorter wavelength than infrared radiation.

• Which is visible light.