00:01
So for this question, we're looking at calculating biological equivalent dose.
00:06
Now what's the difference between biological, equivalent dose, and actual dose, right? biological equivalent dose, or bed, for short, is a combination of a quality factor.
00:22
This quality factor actually depends on radiation, depends on the type of radiation that we're looking at.
00:31
And for our case, we are looking at protons, and protons is given to be 3 .0, right? multiply by the actual physical dose of energy per unit mass, right? so this one can be calculated through physical means.
00:50
So we need the physical dose, and this can be simply taken by using energy per unit mass.
01:00
So the energy, in our case, we have the number of photons.
01:05
We simply multiply a number of photons by the energy that each of them carry, which is 950 kv, right? divided by the mass, the mass itself is 0.
01:17
Sorry, it is 3 .82 milligrams.
01:26
Now, we need to convert all of this into si units because those are in si units, right? so, 950 kv.
01:36
So 950 kv we need to convert it by multiplying by 10 to power 3 to convert it to ev and then 1 .6 x0 times 10 to power minus 19 to convert it to jules.
01:52
For 3 .82 milligrams simply multiply it by 10 to power of minus 10 to power minus 6...