Flashcards
Topic 1
Cards in this deck (35)
- 1What do waves do as their job?transfer energy
- 2what is ment by the medium?The material being moved or what the wave is made of.
- 3what is ment by the period?THe time it takes for one wavelength to pass a fixed pount. T= t/N
- 4what is ment by frequency?The number of wavelengths passing a point, each second.
F= N/t - 5what is ment by the zero position?how the medium would be without a wave distrubing it.
- 6what is ment by the crest of a wave?A point of maximum positive displacement from the zero position.
- 7what is ment by the trough?the bottom of the waves.
- 8what is ment by the amplitude?
- 9what is the equation for using wavelength?lamba= distance / Number of waves
- 10what can we use to analyse a wave?an oscilioscope
- 11what would waves look like if we had a slow time base?/Users/Morrison/Desktop/sound-waves.gif
- 12what would the wave look like if it had a fast time base?
- 13do slow/fast time base give low/high frequency?slow= low
fast=high - 14how do you measure the speed of the wave?v=d/t
- 15what is the two equations used to measure speed of wave?v=d/t , v= lamba /T
- 16what is the speed of sound in air?340m/s
- 17what is a transerve wave?vibrations are at right angles to the direction of travel
- 18name the 7types of light in the EM spectrum?Radio, Microwaves, Infrared, Visable, Ultravoilet, X-rays, Gamma Rays
- 19what is the speed of light in air?3 X 10 8 m/s
- 20what are longnitudal waves?the vibrations travel the same way as direction of wave
- 21give an example of a transverse wave?light (EM SPECTRUM), water waves
- 22give an example of a longitudinal waves?sound waves
- 23can electricmagnetic spectrum waves travel through a vaccum?yep
- 24what is ment by the normal?a line at right angles to the surface
- 25what is ment by the incident ray?the ray of light going towards the pont
- 26what is ment by the refelcted ray?the ray of light going away from the reflection point
- 27what is ment by the angle of incidence?the angle between normal and the ray
- 28what is ment by the angle of reflection?the angle between normal and reflected ray.
- 29what do convex reflectors do?the use the outside of the curve and cause rays from sources to come together and create a beam , such as on cras.
- 30how does a reflecting telescope work?the use a primary mirror to focus light. a second one to reflect the light to a convient point.
- 31what speed does light travel in , in a optical fibre?2x 10 8m/s
- 32what happens to light in an optical fibre?
- 33what is diffraction?When he wave bends around an object
- 34what kind of wavelengths do light have? sound?short wave lenghts, long
- 35where does diffraction occur most ?in big gaps where it can bend easily