720741
Description
Flashcards by Hannah Morrison, updated more than 1 year ago
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Created by Hannah Morrison
over 10 years ago
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| Question | Answer |
| What do waves do as their job? | transfer energy |
| what is ment by the medium? | The material being moved or what the wave is made of. |
| what is ment by the period? | THe time it takes for one wavelength to pass a fixed pount. T= t/N |
| what is ment by frequency? | The number of wavelengths passing a point, each second. F= N/t |
| what is ment by the zero position? | how the medium would be without a wave distrubing it. |
| what is ment by the crest of a wave? | A point of maximum positive displacement from the zero position. |
| what is ment by the trough? | the bottom of the waves. |
| what is ment by the amplitude? | |
| what is the equation for using wavelength? | lamba= distance / Number of waves |
| what can we use to analyse a wave? | an oscilioscope |
| what would waves look like if we had a slow time base? | /Users/Morrison/Desktop/sound-waves.gif |
| what would the wave look like if it had a fast time base? |
Image:
glno (image/jpg)
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| do slow/fast time base give low/high frequency? | slow= low fast=high |
| how do you measure the speed of the wave? | v=d/t |
| what is the two equations used to measure speed of wave? | v=d/t , v= lamba /T |
| what is the speed of sound in air? | 340m/s |
| what is a transerve wave? | vibrations are at right angles to the direction of travel |
| name the 7types of light in the EM spectrum? | Radio, Microwaves, Infrared, Visable, Ultravoilet, X-rays, Gamma Rays |
| what is the speed of light in air? | 3 X 10 8 m/s |
| what are longnitudal waves? | the vibrations travel the same way as direction of wave |
| give an example of a transverse wave? | light (EM SPECTRUM), water waves |
| give an example of a longitudinal waves? | sound waves |
| can electricmagnetic spectrum waves travel through a vaccum? | yep |
| what is ment by the normal? | a line at right angles to the surface |
| what is ment by the incident ray? | the ray of light going towards the pont |
| what is ment by the refelcted ray? | the ray of light going away from the reflection point |
| what is ment by the angle of incidence? | the angle between normal and the ray |
| what is ment by the angle of reflection? | the angle between normal and reflected ray. |
| what 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. |
| how does a reflecting telescope work? | the use a primary mirror to focus light. a second one to reflect the light to a convient point. |
| what speed does light travel in , in a optical fibre? | 2x 10 8m/s |
| what happens to light in an optical fibre? | |
| what is diffraction? | When he wave bends around an object |
| what kind of wavelengths do light have? sound? | short wave lenghts, long |
| where does diffraction occur most ? | in big gaps where it can bend easily |
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