Summit - Electromagnetic Radiation
Questions and Answers Already Passed
What property of electromagnetic waves determines their color?
✔✔Wavelength
Why do X-rays pass through soft tissue but not bone?
✔✔Bones absorb more X-ray radiation than soft tissues
How do sunglasses with UV protection help protect the eyes?
✔✔They block harmful ultraviolet radiation
What happens to electromagnetic waves when they move from one medium to another?
✔✔They change speed and may bend (refraction)
Why does metal reflect radio waves?
✔✔Metal surfaces conduct electricity, causing radio waves to bounce off
1
,What causes a rainbow to form in the sky?
✔✔Refraction, dispersion, and reflection of light in water droplets
Which type of electromagnetic radiation is used for sterilizing medical equipment?
✔✔Ultraviolet light
Why do microwaves heat food but not the plate?
✔✔Microwaves excite water molecules in food, while most plates do not contain enough water
Why are gamma rays dangerous to living cells?
✔✔They have high energy and can damage DNA
What type of electromagnetic waves are used in radar systems?
✔✔Microwaves
Why do astronauts see pure black space even in daylight?
✔✔There is no atmosphere to scatter sunlight
2
, What type of electromagnetic radiation is responsible for heat from the Sun?
✔✔Infrared radiation
Why do optical fibers use total internal reflection?
✔✔To keep light signals trapped inside the fiber and prevent signal loss
How does a prism separate white light into colors?
✔✔By refracting different wavelengths at different angles
Which electromagnetic waves are used in night-vision goggles?
✔✔Infrared radiation
Why does the sky appear red at sunrise and sunset?
✔✔Longer wavelengths like red scatter less than shorter wavelengths
What happens when electromagnetic waves interfere constructively?
✔✔They combine to create a wave with greater amplitude
3
Questions and Answers Already Passed
What property of electromagnetic waves determines their color?
✔✔Wavelength
Why do X-rays pass through soft tissue but not bone?
✔✔Bones absorb more X-ray radiation than soft tissues
How do sunglasses with UV protection help protect the eyes?
✔✔They block harmful ultraviolet radiation
What happens to electromagnetic waves when they move from one medium to another?
✔✔They change speed and may bend (refraction)
Why does metal reflect radio waves?
✔✔Metal surfaces conduct electricity, causing radio waves to bounce off
1
,What causes a rainbow to form in the sky?
✔✔Refraction, dispersion, and reflection of light in water droplets
Which type of electromagnetic radiation is used for sterilizing medical equipment?
✔✔Ultraviolet light
Why do microwaves heat food but not the plate?
✔✔Microwaves excite water molecules in food, while most plates do not contain enough water
Why are gamma rays dangerous to living cells?
✔✔They have high energy and can damage DNA
What type of electromagnetic waves are used in radar systems?
✔✔Microwaves
Why do astronauts see pure black space even in daylight?
✔✔There is no atmosphere to scatter sunlight
2
, What type of electromagnetic radiation is responsible for heat from the Sun?
✔✔Infrared radiation
Why do optical fibers use total internal reflection?
✔✔To keep light signals trapped inside the fiber and prevent signal loss
How does a prism separate white light into colors?
✔✔By refracting different wavelengths at different angles
Which electromagnetic waves are used in night-vision goggles?
✔✔Infrared radiation
Why does the sky appear red at sunrise and sunset?
✔✔Longer wavelengths like red scatter less than shorter wavelengths
What happens when electromagnetic waves interfere constructively?
✔✔They combine to create a wave with greater amplitude
3
