What is the energy of a microwave with a wavelength 1.20 cm?

Question

8932 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-11-23T21:48:21

The energy is approximately #1.6575*10^-23J#

The electro magnetic wave energy can be calculated using formula:

#E=h*f#, where :

#h# is the Planck's Constant #h~~6.63*10^(-34) [J/s]#

#f# is the wave's frequency

We have the wavelength, so first we have to calculate frequency:

#lambda=1.2cm=0.012m=1.2*10^-2m#

#f=c/lambda#, where #c# is the speed of light, so:

#f=(3*10^8)/(1.2*10^-2)#

#f=2.5*10^10Hz#

#E=h*f#

#E=6.63*10^(-34)*2.5*10^10#

#E=16.575*10^-24#

#E=1.6575*10^-23[J*s*1/s=J]#