Waves

What are the two types of waves?
Transverse and Longitudinal
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How do the waves travel in a transverse wave? Perpendicular or Parallel
Perpendicular at right angles to the direction of energy transfer.
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How do the waves travel in a Longitudinal wave? Perpendicular or Parallel
Parallel to the direction of energy transfer
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What does Oscilate mean?
Vibrate
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What are the properties of waves?
Frequency - Number of waves passing a fixed point per second, Amplitude - The maximum displacement that any particle achives, Wavelength - The distance from one point on a wave to the equivalent point, Period - Time taken for one complete oscillation
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How do you calculate Wave speed?
Wave speed = frequency x wavelength
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What is Wave speed?
The speed of a wave is the speed at which the energy is transfered. A measure for how far a wave moves in one second
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Required Practical: The sustainability of appuratus to measure the frequency, wavlength and speed of waves in a ripplee tank
1) Time how long it takes one wave to travel the length of the tank. Use this to calculate wave speed. 2) To find the frequenc, count the number of waves passing a fixed point in a second. 3) Find wavelength using a ruler to measure peak to peak
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What are Electromagnetic Waves?
Transverse waves
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How does the length of an electromagnetic wave affect it?
It affects how it is absored, transmitted, reflected and refracted
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How does light travel from a material with a low fractive index to one with a higher refractice index?
It bends toward the normal.
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How does light travel from a material with a higher refractive index to one with a lower refractive index?
It bends away from the normal.
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When do light waves travel differantly
When traveling through a differant media
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When are ray diagrams used?
When a diagram is needed to to represent how light moves from one place to another.
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Are waves refracted when waves reach a boundry between one medium and another?
Yes
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Required Practical: Investiagte how the amount of infared radiation absorbed or radiated by a surface depends on the nature of that surface
1)Take 4 Bioling tubes painted differant colours. 2) Pour hot water in tubes. 3)Measure/record start temp. 4)Measure temp every 10min 5)Tube that cools the fastest, emits infared energy quickest
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How are EM waves formed, and how are they hazards?
Changes in atoms & nuclei of atoms can result in EM waves. Ultraviolet waves cause skin to age prematurely and increase risk for skin cancer. Xrays & Gamma rays are ionising radiation they damage cells, in some case gene mutation and cancer
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Other cards in this set

Card 2

Front

How do the waves travel in a transverse wave? Perpendicular or Parallel

Back

Perpendicular at right angles to the direction of energy transfer.

Card 3

Front

How do the waves travel in a Longitudinal wave? Perpendicular or Parallel

Card 4

Front

What does Oscilate mean?

Card 5

Front

What are the properties of waves?