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Light and Waves

M M Physics Year 9 Inglés 37 fichas

Fichas del conjunto (37)

1State the 7 qualities that define a waveWavelength, Frequency, Amplitude, Crest, Trough, Period and Speed.
2Define wavelengthDistance between 2 successive similar points on the wave. Ie. Crest to crest.
3Define FrequencyNumber of waves passing a fixed point each second. Measured in Hertz, Hz.
4Define AmplitudeDistance from the midpoint of the wave to its high point or its low point.
5Define CrestHigh point of wave.
6Define TroughLow point of wave (opposite of crest).
7Define PeriodTime taken for 1 wavelength to pass a given point.
8Define SpeedHow fast the wave moves in a set period of time.
9What type of wave is this?Longitudinal
10What type of wave is this?Transverse
11What is the relationship of the angle between the incident ray and reflective ray?Angle of incident=Angle of reflection. At whatever angle the incident ray hits the mirror the reflective ray should reflect at the same angle.
12What is this?Concave Lens
13What is this?Convex Lens
14What is this?Concave Mirror
15What is this?Convex Mirror
16Definition of a Transverse WaveTransverse Wave=Light Wave
17How does a transverse wave travel?The photon of light oscillates at a 90-degree angle and the energy of the wave goes up and down but the overall direction it is heading is straight.
18How is an object seen?Non-luminous objects can be seen by the light hitting a non-luminous object which is then reflected to your eye. Light can move as it is a form of energy.
19What does a convex lens do to light rays?A convex lens causes light rays to be refracted towards the normal and converge.
20What does a concave lens do to light rays?A concave lens causes light rays to be refracted away from the normal and diverge
21What is the 'normal'?Normal is a line drawn perpendicular to the surface of mirror from point the point where incident ray meets the surface of the mirror.
22Definition of a longitudinalLongitudinal Wave=Sound wave
23How is a longitudinal wave caused?Sound is the product of vibrations and so the sound wave is caused by vibrations from an object.
24How do longitudinal waves travel?The sound wave transfers energy through the vibration of air particles or the particles of a solid which the sound travels (the medium).
25What state of matter do longitudinal waves travel through the fastest?Solid because the particles are more tightly packed therefore the vibrations are more easily passed from particle to particle and so it travels faster.
26Copy and complete this transverse wave with wavelength and amplitude
27What is the symbol for wavelength?λ
28How do you know if a sound wave is louder than another sound wave?The larger the amplitude of the wave, the louder the sound and the more energy it has.
29Which one of these is louder?
30What does frequency indicate?Frequency of a wave indicates the number of waves per second
31How do you find the frequency of a wave?Frequency [ƒ] = Number of waves passed ÷ Time [s]
32Copy and complete this table using the frequency formula.
33What is the difference between a concave and convex mirror?Concave mirrors converge which means the light rays reflect back towards the mirror and into each other whether a Convex mirrors diverges which means the light rays reflect away from the mirror and each other.
34What do sound waves need to travel?A sound wave can only travel if there is a medium for it to propagate so that the sound energy can be transferred.
35What does a convex mirror cause light rays to do?A convex mirror causes light rays to diverge.
36What does a concave mirror cause light rays to do?A concave mirror causes light rays to converge onto a focal point.
37What distance and where will an object appear behind a mirror?If it’s a flat mirror and an object is in front of it than the object will appear the same distance behind the mirror than it is in front.