Here are solutions to the Waves & Radiation exam questions. I have added a breakdown of the marks in red.
Here are some questions from the old Standard Grade and Intermediate 2 exams that fit the waves and radiation unit of National 5 Physics. I will post solutions with a breakdown of the mark allocation shortly.
Here are some summary notes to help with your revision for the waves and radiation unit assessment. Your test is scheduled for Friday 24th April.
Extra revision materials and questions are available on BBC Bitesize.
The attached pdf document contains notes to help with your revision of the national 5 waves and radiation unit. Your unit assessment is scheduled for next week (see calendar dates on right on screen). Additional revision materials are available on BBC Bitesize.
This week, we’ve looked at calculating radiation doses. The absorbed dose, measured in Grays, takes into account the mass of the absorbing tissue, while the equivalent dose (in Sieverts) gives an indication of the potential for biological harm.
Equivalent dose is calculated using a weighting factor. More damaging forms of radiation have a larger weighting factor.
Absorbed dose and equivalent dose are usually expressed in smaller units; uGy, mGy, uSv, mSv.
Here is a poster from the excellent xkcd site that explores examples of the different levels of equivalent dose.
Click on the picture for a larger version.
Notice that the scale changes as you move through the poster from blue to green to red.
The dosimetry topic is very short and comprehensively covered at BBC Bitesize.