Waves have properties (such as wavelength, frequency, period, speed, amplitude, intensity, direction and phase) which can be measured. Some of these properties are related. That is, if one of a pair of related properties is known, then the other can be worked out. Which of the following lists contain properties that are all unrelated to each other?

Amplitude, period, intensity, phase

Frequency, amplitude, period, wavelength

Direction, speed, amplitude, phase

Phase, wavelength, speed, frequency

Direction, speed, amplitude, phase Frequency and wavelength are related, as are amplitude and intensity.

A. The effect on light rays as they enter the cornea of the eye

B. Light rays from an object meeting at a point to form a sharp image

C. A light ray travelling away from a surface at the same angle that the light ray approached the surface

D. A light ray travelling through a glass with a faster speed than it would have in air

A. Sound frequency (pitch)

B. Sound intensity (energy)

C. Sound pressure

D. Sound level (loudness)

A. The period

B. The displacement

C. The amplitude

D. The wavelength

A. Audible

B. Painful to listen to

C. Ultrasonic

D. Close to the threshold of hearing

A. Electromagnetic waves

B. Mechanical waves

C. Longitudinal waves

D. Compressional waves

A. The method by which the energy carried by visible light is propagated.

B. Travelling oscillations in the magnitude and direction of electric and mag-netic fields that do not require a material medium.

C. A periodic disturbance in some property of the medium, the medium itself remains (relatively) at rest.

D. A mechanism for the transfer of energy without the transfer of matter.

A. 50 dB

B. 70 dB

C. 90 dB

D. 120 dB

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