Photons with a frequency of 2.5X1014 Hz collide off an electron in a Compton Eff
ID: 1301759 • Letter: P
Question
Photons with a frequency of 2.5X1014 Hz collide off an electron in a Compton Effect experiment. What is the change in wavelength of the photons if the photon rebounds at a right angle (at an angle of 90 degrees)? If the electron ends up moving with a velocity of 765 m/s, what is its Debroglie wavelength? If the deflection occurs at an angle greater than 90 degrees, making the speed of the electron greater, what will happen to the above two answers? The change in wavelength will be less and the Debroglie wavelength will be less. The change in wavelength will be greater and the Debroglie wavelength will be less. The change in wavelength will be less and the Debroglie wavelength will be greater. The change in wavelength will be greater and the Debroglie wavelength will be greater. depends on what the angle is! Two unrelated radioactivity problems arc asked below. Thorium 234 90Th decays into Protactinium 234 91 Pa via what type of decay? The half life of Carbon-14 is around 6000 years old. How old is a fossil with only 1/4 of the Carbon-14 it had when it died?Explanation / Answer
1)L - L' = h/mc*(1-cos 90)
L - L' = h/mc = (6.62*10^-34)/(9.1*10^-31*3*10^8) = 2.43*10-12 m
2) L = h / mv = ((6.62*10^-34)/(9.11*10^-31*765) = 951 nm
3) L = h / mv
L' = h / mv'
as v' > v
L' < L ........and L - L' is greater
4) emission of beta - particle will increase the atomic number by 1 and keeps the mass number same
5)
t1/4 = 2*t1/2 = 1200 years