1) How many Joules of energy are contained in a photon with a wavelength of 550nm?
2) The radio station KUSC broadcasts at 91.5 MHz. Calculate its wavelength in meters.
PLEASE PLEASE PLEASE explain what you did, thank you so much!!
2) The radio station KUSC broadcasts at 91.5 MHz. Calculate its wavelength in meters.
PLEASE PLEASE PLEASE explain what you did, thank you so much!!
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1) The energy of a photon can be found by the equation:
E(photon)=hv
Where v is equal to the frequency of the wave, and h is equal to Planck's constant, which is 6.626*10^-34.
First you have to find the frequency of the photon by c=λv. The speed of light (3.00*10^8) is equal to the frequency of the wave times the wavelength. Divide 3.00*10^8 by 5.50*10^-7 (nm to meters, which wavelength is measured in, to give you a measurement of frequency in Hertz). You get 5.45*10^14.
Now that you have the frequency, simply multiply it by Planck's constant to get the energy of the photon. You end up with 3.61*10^-19.
2) c=λv
First, convert 91.5 MHz to Hz. 10^6 is the conversion. 9.15*10^7 Hz is its frequency. Divide 3.00*10^8 (speed of light) by this number to get the wavelength. You get 3.28 meters, which is the wavelength.
Hope this helps you!
E(photon)=hv
Where v is equal to the frequency of the wave, and h is equal to Planck's constant, which is 6.626*10^-34.
First you have to find the frequency of the photon by c=λv. The speed of light (3.00*10^8) is equal to the frequency of the wave times the wavelength. Divide 3.00*10^8 by 5.50*10^-7 (nm to meters, which wavelength is measured in, to give you a measurement of frequency in Hertz). You get 5.45*10^14.
Now that you have the frequency, simply multiply it by Planck's constant to get the energy of the photon. You end up with 3.61*10^-19.
2) c=λv
First, convert 91.5 MHz to Hz. 10^6 is the conversion. 9.15*10^7 Hz is its frequency. Divide 3.00*10^8 (speed of light) by this number to get the wavelength. You get 3.28 meters, which is the wavelength.
Hope this helps you!
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3.626*5.45=36.1117 Add exponents when multiplying numbers in scientific notation. -34+14= -20. 36.1 must become 3.61 to follow sig figs and scientific notation, meaning you add one to the original exponent you got, b/c you made the number smaller. You end up with 3.61*10^-19. Disregard other comment
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