Achieve #13

[Isela Tamayo 3H]

The E.coli bacterium is about 1.8 μm long. Suppose you want to study it using photons of that wavelength or electrons having that de Broglie wavelength.

What is the energy E photon of the photon?
What is the energy E electron of the electron?

I'm confused by this problem and I am not sure where to start?

[Autumn Jackson Dis 1J]

Basically you want to use a wavelength that's the exact same as the length of the worm,which is 2.0 micrometers.

a) Convert micrometers to meters, which should be 2.0x10^-6 meters. Plug it into the equation E=hv by replacing v(frequency) with c/wavelength, and solve for E
b) For the energy of an electron, you need to find its KE, which is 1/2mv^2. To find the velocity, use De Broglie's Equation, wavelength=h/p, and substitute p for massxvelocity. Solve for equation v=h/m(wavelength) and you should get your answer.

[Kaitlin Joya 1I]

Basically you want to use a wavelength that's the exact same as the length of the worm,which is 2.0 micrometers.

a) Convert micrometers to meters, which should be 2.0x10^-6 meters. Plug it into the equation E=hv by replacing v(frequency) with c/wavelength, and solve for E
b) For the energy of an electron, you need to find its KE, which is 1/2mv^2. To find the velocity, use De Broglie's Equation, wavelength=h/p, and substitute p for massxvelocity. Solve for equation v=h/m(wavelength) and you should get your answer.

Can E = pc also be used for this?

[305607822]

^^ I have the same question as Kaitlin. Why can't we use the equation E electron = pc? I used this formula and got the exact same energy as the energy for the photon, which is wrong. Why do we have to use the equation for the electron's KE?