Question

Microwave ovens emit microwave energy with a wavelength of 12.5 cm. What is the energy of exactly one photon of this microwave radiation?

I'm on sapling and I did it couple times, but I kept getting it wrong!!! I followed all the notes I have from lecture, can someone please help

thank you

Answer 1

Can I see your work?

Answer 2

ok, hold on

Answer 3

First I converted 12.5 cm to meters which is 0.125m , then by using
wavespeed = frequency x wavelength

3x10^8= f x 0.125
f= 2400000000

then I plugged it in to this equation; E= h x f

E = (6.63x10^-34)(2400000000)

E= 1.5912x10^-24

I get a differ answer every time i do it, lol

did I do it right this time?

Answer 4

@matt101

Answer 5

It's easier if you use scientific notation for these kinds of questions, that way you won't accidentally type in the wrong number of 0's into your calculator. Otherwise I agree with your process.

Solving for frequency you get f = 2.4 x 10^9
Solving for energy you get E = 1.59 x 10^(-24)

So yes, I agree with your answer this time!

Answer 6

Thank you. correct answer this time :)

Answer 7

@matt101

Answer 8

First I converted 12.5 cm to meters which is 0.125m , then by using
wavespeed = frequency x wavelength

3x10^8= f x 0.125
f= 2400000000

then I plugged it in to this equation; E= h x f

E = (6.63x10^-34)(2400000000)

E= 1.5912x10^-24

I get a differ answer every time i do it, lol

did I do it right this time?