Wave Optics and Introduction to Quantum Physics chpt 29 Please put your answers

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Wave Optics and Introduction to Quantum Physics chpt 29
Please put your answers next to the numbers of the problems below, and I will rate!

QUESTION 10 What is the maximum velocity (in 100 m/s) of electrons ejected from a material by 97 nm photons, if they are bound to the material by 4.83 ev? QUESTION 11 How many photons per second are emitted by the antenna of a microwave oven if its power output is o.755 kw at a frequency of 2,423 MHz? Give your answer on the order of 1026 QUESTION 12 hat is the accelerating voltage (in kilovolts) of an x-ray tube that produces x rays with a wavelength of 22.1 pm?

Explanation / Answer

KE = hc/lambda - w

w = work function = 4.83 eV = 7.728 x 10^-19 J

lambda = 97 nm = 97 x 10^-9 m

KE = 1.278 x 10^-18 J

KE = mv^2/2

v = sqrt(2KE/m)

m = mass of electron = 9.11 x 10^-31 kg

v = 1.67 x 10^6 m/s

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