Waves Continuted Flashcards
(21 cards)
Refraction
The __________ travels __________ in a ______ or a vacuum and _________ and _________.
Refraction
The light travels fastest in a gas or a vacuum and solids and liquids.
Refraction
Light ________ at ____________ ______ through different ____________.
Refraction
Light travels at different speeds through different substances.
Refraction
Sound travels fastest through a ________.
Sound travels fastest through a solid.
If the angle of incidence is smaller than the critical angle, what occurs ?
Refraction
If the angle of incidence is greater than the critical angle the light is …
Reflected
What is wave length ?
The distance between to crests next to each other in metres
What is amplitude
The amplitude us the maximum displacement of the wave.
What is frequency.
The number of waves passing a point in 1 second (hertz)
What is Time period
This is the time for one wave in seconds
H =
2
Hertz
A =
A = amplitude
I=
R=
I= angle of incidence R= angle of reflection
Equation for velocity in waves
V = f x λ
Danger of electro magnetic radiation
Gamma rays and X-rays ?
Because if there high frequency they are dangerous
Gamma rays can be used to kill cancer cells with a laser
Gamma rays and X-rays can cause mutation and cancer
Danger of electro magnetic radiation
Ultra violet ?
Ultra violet Rays can cause nutation and skin cancer
Why is an X-ray image seen ?
Because the bone absorbs it
Which type of electromagnetic wave is used when a traffic light signal communicates with a car driver?
Visual light
What is the order of the 7 types in the electromagnetic spectrum ?
Radio Microwave Infrared Visual light Ultra violet X-rays Gamma rays
What are the uses for the 7 types of wave in the electromagnetic spectrum?
Radio - communication
Microwave- satellite communication
Infrared - heating, monitoring temperature
Visual light - photography
Ultra violet - fluorescent lamps
X-rays - lets us see through objects
Gamma rays - to sterilise medical equipment (kills microbes)
Equation for frequency
F= 1/T
Equation for speed ?
S= d/T
