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Properties of waves

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Question 15

This question is about waves.

a.

The diagram represents a wave on a string at an instant in time.

A graph showing a transverse wave on a string. The vertical axis is labeled 'displacement in mm' with markings at -6, -3, 0, 3, and 6. The horizontal axis is labeled 'distance in m' with tick marks at 0.2, 0.4, 0.6, 0.8, 1.0, and 1.2. The wave starts at a maximum of 6 mm at 0 m, decreases to 0 at 0.2 m, reaches a minimum of -6 mm at 0.4 m, rises back to 0 at 0.6 m, reaches a maximum of 6 mm at 0.8 m, descends to 0 at 1.0 m, and reaches a minimum of -6 mm at 1.2 m.

What is the wavelength of the wave?

A 0.4 m0.4\text{ m}0.4 m

B 0.8 m0.8\text{ m}0.8 m

C 1.2 m1.2\text{ m}1.2 m

D 1.6 m1.6\text{ m}1.6 m

[1]
b.

What is the amplitude of the wave?

A 3 mm3\text{ mm}3 mm

B 6 mm6\text{ mm}6 mm

C 12 mm12\text{ mm}12 mm

D 24 mm24\text{ mm}24 mm

[1]
c.

Describe how particles in the medium vibrate relative to the direction of energy transfer for both transverse and longitudinal waves.

[2]
d.

Aside from being transverse, state two properties that are the same for all electromagnetic waves.

[2]
e.

Some waves have medical and diagnostic applications.

Which type of electromagnetic wave is used in thermal imaging to detect body heat?

A infrared

B ultraviolet

C radio waves

D X-rays

[1]
f.

High-speed communication systems use optical fibres. Which type of wave is commonly used to transmit signals through these fibres?

A radio waves

B ultraviolet

C infrared

D gamma rays

[1]
g.

Ultraviolet (UV) radiation is used in sunbeds for tanning skin. Explain why people are advised to limit their exposure to UV radiation.

[2]

Properties of waves Questions

  1. IGCSE
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