Waves
what is the unit of frequency?
Hertz
one wave behaviour
Reflection OR refraction Or Transmission Or Absorption
How many EM waves are there?
What device is used to measure count rate?
Geiger Muller Tube
What formula is specific to waves to determine wave speed?
v = f . Lambda
Where would light propagate the slowest?
Solid
What is the speed of EM waves in vacuum (in numbers)?
3 x 108 m/s
Which radiation is negative
beta minus
what is "an imaginary line that is drawn across the peaks of the different waves. "?
Wavefronts
What is the Law of reflection?
Incident Angle = Reflected Angle
Which EM wave is used in airport security
Xrays
Which radiation is most dangerous outside the body
Alpha
How to find the frequency in a ripple Tank?
Count the number of waves passing a specific point in a period of time.
Divide counts by time (seconds)
how would light behave when crossing from air to water?
Refracts Towards the normal
Which color has a longer wavelength than Orange
Red
What is half life?
Time for activity to halve
Time for half the nuclei to decay
How can speed of sound be calculated using microphones and an oscilloscope?
Fix one microphone in place
Move the other microphone until there is one wavelength between them.
find frequency from oscillocope
use v = f. wavelength
How would sound waves behave when crossing from air to metal?
refracts away from the normal
who discovered infrared
William Herschel
An element of half life 2 hrs. its original activity 500 Bq is what is its current activity after 6 hrs
62.5 Bq