r and effect. This earns the remaining two marks: one for identifying visible light and one for describing its energy transfer."}]}],"generatedAt":"2026-07-22T12:10:59.514Z","modelVersion":"gpt-5.6-terra+diagrams-1","explanationVersion":"v3"},"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"6cccda5f-a8c5-4831-bed8-432c3f1b7d14","revisionId":"0406969f-11fd-40dc-968f-7eac42088fc1","questionNumber":null,"questionType":"LA","specification":"","difficulty":5,"difficultyBand":"medium","totalMarks":6,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"081086e8-d866-4105-bad7-a29117adb644","label":null,"content":"X-rays and radio waves are both types of electromagnetic radiation, but they have very different properties and applications.\n\nCompare X-rays with radio waves.\n\nIn your answer, you should refer to:\n* the principal uses of both types of radiation\n* the hazards associated with exposing human tissue to each\n* the different ways in which they are produced, referring to electrical circuits or high-speed electron collisions.","markscheme":"- Explains that radio waves are generated by oscillating electrons (alternating currents) in electrical circuits B1\n- Explains that X-rays are generated by high-speed electrons colliding with a metal target (or transitions of inner-shell electrons) B1\n- Identifies key uses of radio waves, such as television/radio broadcasts or wireless communication B1\n- Identifies key uses of X-rays, such as medical bone imaging, CT scans, or airport security scanners B1\n- Compares hazards: radio waves are non-ionising and present minimal risk to human tissue, whereas X-rays are highly ionising and can cause DNA damage, gene mutations, or cancer B1\n- Structure comparison clearly, linking the physical differences (energy/ionisation) to their safety profiles and technical applications C1","marks":6,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"structured_comparison","label":"Build a clear comparison","steps":[{"type":"text","order":0,"title":"Compare the sources","content":"Start with a direct comparison of production:\n\n> **Radio waves are made by oscillating electrons in an alternating-current circuit, whereas X-rays are made when high-speed electrons hit a metal target.**\n\nThe radio-wave statement earns **B1** for production. The X-ray statement earns **B1** for production.","highlights":[{"text":"the different ways in which they are produced, referring to electrical circuits or high-speed electron collisions.","location":"specification"}]},{"type":"text","order":1,"title":"Compare the uses","content":"Then give one clear use of each:\n\n> **Radio waves are used for broadcasting and wireless communication, whereas X-rays are used for bone imaging.**\n\nBroadcasting or wireless communication earns the radio-wave **B1**. Bone imaging earns the X-ray **B1**.","highlights":[{"text":"the principal uses of both types of radiation","location":"specification"}]},{"type":"text","order":2,"title":"Compare hazards and properties","content":"Finish by linking the properties to both safety and use:\n\n> **Radio waves are lower-energy and non-ionising, so they present minimal risk to human tissue and are suitable for broadcasting and wireless communication. X-rays are higher-energy: they pass through soft tissue more readily than bone, producing a bone image, but they are ionising and can damage DNA, causing mutations or cancer.**\n\n**Examiner annotation — B1:** explicitly contrasting non-ionising radio waves with ionising X-rays that can damage DNA.\n\n**Examiner annotation — C1:** this links the physical differences to applications and safety: X-rays can penetrate soft tissue for imaging but can ionise atoms in tissue; lower-energy radio waves support communication with minimal tissue risk.","highlights":[{"text":"the hazards associated with exposing human tissue to each","location":"specification"}]}]}],"generatedAt":"2026-07-22T09:36:29.957Z","modelVe

Uses and dangers of electromagnetic radiation

Question 2

Uses and dangers of electromagnetic radiation Questions

Uses and dangers of electromagnetic radiation

Question 2

Uses and dangers of electromagnetic radiation Questions