If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/p2-gcse-aqa-h-t_4.09. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom
How are gamma rays "produced"? Can you only use radioactive material such as Cobalt 60 or can you just power an X-Ray-tube with 100kV to produce gamma rays?
Excellent question - the answer is that this video is misleading, as are most GCSE level text books. In reality, X-rays and gamma rays differ only in their source but the characteristic of the "ray" can be identical. X-rays are produced by passing a current though an x-ray vacuum tube (they are synthetic and turning off the power will turn off the x-rays). Gamma rays are produced by unstable isotopes during nuclear decay (you can't turn off the process). Crucially, x-rays and gamma rays can have the same energy and therefore frequency. So to answer your question, yes, you can use an x-ray tube to achieve a 100KeV wave/photon (see "wave/particle duality" if interested) but they would still be classed as x-rays because of the source.
im confused in my cgp book it says xrays will pass easily through flesh nut not easily through denser materials such as bones but u said the complete opposite? loved ur video but just confused cus i dont know which one is right
Hi Sabrina, if you go to 0:42 and watch from there again, as what you've written is the same thing as we've said in the video: that the X-rays will pass easily through less dense materials (air in your lungs), but NOT through denser materials (bones), and pass partially through the softer fleshy parts of your body (this is why flesh is grey on X-ray images, and not black or white)? I hope this clears up any confusion :)
No, this is what he said. He said that X-Ray waves are absorbed by dense materials such as bones which is why they aren't detected by the detector plate. Hope this helps
where is a huge mistake in difference between Gamma and X rays: Gamma Radiation: Gamma rays have the shortest wavelengths in the electromagnetic spectrum, typically less than 0.01 nanometers (nm). They have extremely high-frequency electromagnetic waves. X-Rays: X-rays have longer wavelengths compared to gamma rays, ranging from 0.01 to 10 nanometers (nm). X-rays have higher wavelengths than gamma rays but shorter wavelengths than ultraviolet light.
Heya, the raw materials for photosynthesis are just water and carbon dioxide. Electromagnetic radiation in the visible light range is used to provide the energy, but we don't count it as a raw material. Hope that helps!
Respectfully stfu the only reason I passed is because of this if u don’t like the explanation u would go try to find another vid that explains better than this which u wont cuz there isn’t
