00:01
Okay, here we have a kind of fun problem about the wavelength.
00:05
So we're told that a typical size for a virus is about 50 nanometers.
00:11
And in order to study something, we typically want to have the wavelengths be roughly one -tenth of the length of the objects we're trying to study.
00:21
So lambda should be actually less than equal to.
00:27
One -tenth of, i'll say l, the length.
00:34
And then the problem notes that since energy increases with, or actually say decreases with wavelengths, oftentimes the light we would need to be able to study something accurately or in detail would destroy the object.
00:53
So this question is going to ask us to find the energy of a photon and the energy of an electron which have the same wavelength.
01:05
That wavelength is going to be one -tenth of the length.
01:09
So lambda is five nanometers.
01:15
So in question a, they ask us to find the energy of a photon with this wavelength.
01:20
And we know that energy is related to wavelength for light at least.
01:27
With the formula hc over lambda...