Electromagnetic Spectrum Questions
and Answers Latest Update 100% Pass
Which electromagnetic waves are used for sterilizing medical equipment?
✔✔Ultraviolet radiation
How do electromagnetic waves transfer energy?
✔✔Through oscillating electric and magnetic fields
What happens to light waves when they pass through a narrow slit?
✔✔They spread out due to diffraction
Why do solar panels absorb visible and infrared light?
✔✔To convert sunlight into electrical energy
How does a radio antenna receive signals?
✔✔It detects radio waves and converts them into electrical signals
1
,Which type of electromagnetic wave is used in nuclear radiation detection?
✔✔Gamma rays
Why does glass allow visible light to pass but block ultraviolet waves?
✔✔It absorbs higher-energy UV radiation while transmitting lower-energy visible light
Why do compact fluorescent lights (CFLs) produce visible light?
✔✔They excite gas inside the bulb, which emits UV light that is converted into visible light by a
coating
Why does water block radio signals but allow visible light to pass?
✔✔Water absorbs radio waves but is transparent to visible light
Why do satellites need to be above Earth’s atmosphere to detect some electromagnetic waves?
✔✔The atmosphere absorbs certain wavelengths, like X-rays and gamma rays
Why do mobile phone signals weaken inside buildings?
✔✔Walls absorb and reflect electromagnetic waves, reducing signal strength
2
, What is the range of frequencies that make up the electromagnetic spectrum?
✔✔From radio waves to gamma rays
Which type of electromagnetic wave has the longest wavelength?
✔✔Radio waves
Which type of electromagnetic wave has the highest energy?
✔✔Gamma rays
What part of the electromagnetic spectrum is visible to the human eye?
✔✔Visible light
What type of electromagnetic waves are used in microwave ovens?
✔✔Microwaves
Why do X-rays pass through soft tissue but not bones?
✔✔Bones absorb more X-ray energy than soft tissue
3
and Answers Latest Update 100% Pass
Which electromagnetic waves are used for sterilizing medical equipment?
✔✔Ultraviolet radiation
How do electromagnetic waves transfer energy?
✔✔Through oscillating electric and magnetic fields
What happens to light waves when they pass through a narrow slit?
✔✔They spread out due to diffraction
Why do solar panels absorb visible and infrared light?
✔✔To convert sunlight into electrical energy
How does a radio antenna receive signals?
✔✔It detects radio waves and converts them into electrical signals
1
,Which type of electromagnetic wave is used in nuclear radiation detection?
✔✔Gamma rays
Why does glass allow visible light to pass but block ultraviolet waves?
✔✔It absorbs higher-energy UV radiation while transmitting lower-energy visible light
Why do compact fluorescent lights (CFLs) produce visible light?
✔✔They excite gas inside the bulb, which emits UV light that is converted into visible light by a
coating
Why does water block radio signals but allow visible light to pass?
✔✔Water absorbs radio waves but is transparent to visible light
Why do satellites need to be above Earth’s atmosphere to detect some electromagnetic waves?
✔✔The atmosphere absorbs certain wavelengths, like X-rays and gamma rays
Why do mobile phone signals weaken inside buildings?
✔✔Walls absorb and reflect electromagnetic waves, reducing signal strength
2
, What is the range of frequencies that make up the electromagnetic spectrum?
✔✔From radio waves to gamma rays
Which type of electromagnetic wave has the longest wavelength?
✔✔Radio waves
Which type of electromagnetic wave has the highest energy?
✔✔Gamma rays
What part of the electromagnetic spectrum is visible to the human eye?
✔✔Visible light
What type of electromagnetic waves are used in microwave ovens?
✔✔Microwaves
Why do X-rays pass through soft tissue but not bones?
✔✔Bones absorb more X-ray energy than soft tissue
3
