Term
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Definition
longitudinal=sound
transverse=light |
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Term
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Definition
| degree (°), hertz (Hz), metre (m), metre/second (m/s), second (s). |
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Term
section 3
WAVE (PROPERTIES) |
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Definition
amplitude, frequency, wavelength and period of a wave
wave speed = frequency × wavelength
v = f × wavelength
frequency = 1/ time period
T= 1/f |
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Term
section 3
THE ELECTRO MAGNETIC SPECTRUM |
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Definition
the electromagnetic spectrum includes radio, microwave, infrared, visible, ultraviolet, x-ray and gamma
ray radiations
• radio waves: broadcasting and communications;
• microwaves: cooking and satellite transmissions;
• infrared: heaters and night vision equipment;
• visible light: optical fibres and photography;
• ultraviolet: fluorescent lamps;
• x-rays: observing the internal structure of objects and materials and medical applications;
• gamma rays: sterilising food and medical equipment |
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Term
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Definition
light waves are transverse waves which can be reflected,
refracted and diffracted
the difference between analogue and digital signals is that a digital signal is either on or off whereas an analog signal can be 'in the middle'
the frequency range for human hearing is 20 Hz – 20,000 Hz
an oscilloscope and microphone can be used to display a sound wave |
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Term
section 4
ENERGY RESORSES + ENERGY TRANSFER |
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Definition
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