Flashcards
P1 Topc 3
Flashcards do conjunto (19)
- 1What is the amplitude of a wave?The maximum height of the wave, measured in metres
- 2What is the wavelength of a wave?The distance between two corresponding points on the wave, measured in metres
- 3What is the frequency of waves?How many waves pass by every second, measured in Hertz (Hz)
- 4What is the formula to work out wave speed?Wave speed= frequency x wavelength
- 5What is 1kHz in Hz?1000 Hz
- 6What is 1 MHz in Hz?1000000 Hz
- 7Name the 2 types of wavesLongitudinal and transverse
- 8What do waves travel in?Straight lines
- 9What 3 things can change the direction of a wave?Reflection, Refraction and Diffraction
- 10What is the law of reflection?Angle of incidence = Angle of reflection
- 11Where are these angles always defined between?Between the ray itself and the normal
- 12When does total internal reflection happen?When the light ray travels through a dense material towards a less dense substance
- 13Why does total internal reflection happen?If the angle of incidence is bigger than the critical angle
- 14What is diffraction?All waves spread out at the edges when they pass through a gap or pass an object
- 15What does the amount of diffraction depend on?The size of the gap relative to the wavelength of the wave. The narrower the gap the more the wave spreads out
- 16What is refraction?When a wave goes from one medium to another at an angle it changes speed and direction
- 17What do the waves to the left of the EM spectrum have?Least energy, they are less dangerous, low frequency and long wavelength
- 18What do the waves to the right of the EM spectrum have?More energy, they are dangerous, high frequency, short wavelength
- 19Name the 7 waves in the EM spectrum from left to rightRadio, Micro, Infrared, Light, Ultraviolet, X-Rays, Gamma
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- FlashCards sobre P1 Topc 3, criado por jade16 em 18-01-2015.
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- jade16
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