00:01
Hi, so we are to calculate the brogue this wavelength of the electron traveling at the given speed.
00:09
So to solve for this, we're going to use the formula or the brogue this equation.
00:16
That's wavelength is equivalent to plank's constant, h, over mass of the object, and then multiplied by the speed.
00:25
So now we plug in the information for h.
00:31
Is constant so this is equivalent to 6 .626 times 10 to the negative 34 jol seconds okay this is planks constant and then the mass of electron is 9 .11 times 10 to the negative 31 this is in kilograms it's not given in the problem but this could be looked up in standard reference materials and then speed is 1 .35 times 10 to the 5 meters per second.
01:05
So let's calculate first the denominator times 10 to the negative 34.
01:12
Remember, joles is equivalent to kilogram meters squared per second squared.
01:19
So i'm going to write that here so that we could cancel the units in our denominator.
01:26
And don't forget to write another.
01:32
Second in here.
01:39
Remove this.
01:42
These are the units.
01:44
Okay, so now the denominator is equivalent to 1 .22.
01:52
985 times 10 to the negative 25...