Electromagnetic waves 2

• What are the three types of radiation mentioned in the study material?

  Ultraviolet, X-rays, and gamma rays
• What should you know after studying this topic?

  Uses and dangers of ultraviolet, X-rays, and gamma rays
• How does sunscreen protect our skin?

  It protects our skin from damage by ultraviolet radiation from the Sun
• How would you investigate the effectiveness of sunscreen?

  By testing how well it protects skin from ultraviolet rays
• What is the position of ultraviolet radiation in the electromagnetic spectrum?

  It is between violet light and X-rays
• What is one use of ultraviolet waves?

  Security markers use ink that absorbs ultraviolet waves and emits visible light
• What are the dangers of ultraviolet radiation?

  It can cause blindness and skin cancer
• What is required to stop X-rays?

  A thick plate of lead
• What are two uses of X-rays?

  To detect cracks in metal objects and to create images of broken bones
• How do X-rays interact with the body?

  They pass through soft tissue but are absorbed by bone
• Why do X-ray operators stand behind a screen during X-ray imaging?

  To avoid exposure to too much radiation
• What type of radiation are X-rays classified as?

  Ionising radiation
• What is one use of gamma rays in medicine?

  To sterilise surgical instruments
• How do gamma rays treat cancer?

  They are aimed at cancer cells to deliver the maximum dose
• What must workers do to monitor their exposure to gamma radiation?

  Wear radiation badges
• How does the amount of harm from radiation depend on the type of radiation?

  It depends on the type of radiation and the size of the dose
• Which groups of the electromagnetic spectrum can cause harm to living cells?

  The groups with the shortest wavelengths
• In what order should the parts of the electromagnetic spectrum be arranged based on decreasing wavelength?

  Gamma, X-rays, ultraviolet
• Why is gamma radiation used to treat cancer?

  Because it can kill cancer cells while minimizing damage to healthy tissue
• What is the electromagnetic spectrum?

  A range of all types of electromagnetic radiation
• What does ionising radiation do?

  It can damage or kill living cells
• What is the purpose of lead aprons during X-ray procedures?

  To avoid damage to other parts of the body from radiation
• What does a film badge indicate?

  How much ionising radiation the wearer has received