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by BlastRoom
Match electromagnetic spectrum bands to useful technologies and the physical reasons they work.
#physics
40 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
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Sell tours. Nice, standard, or a total scam.
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More correct answers pulls the rope your way.
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Use the spectrum figure. Which technology commonly uses the shaded band to send information over long distances?
Use the spectrum figure. Which everyday device uses the shaded band to heat food containing water?
Use the spectrum figure. Which device detects the shaded band emitted strongly by warm people and animals?
Use the spectrum figure. Which technology forms an image mainly with the shaded band that human eyes can detect?
Use the spectrum figure. Which device commonly emits the shaded band to darken skin pigment?
Use the spectrum figure. Which technology uses the shaded band to image teeth and bones?
Use the spectrum figure. Which technology can use the shaded band to sterilize sealed medical products?
Use the spectrum figure. Which technology uses the shaded band for signals around 2 GHz to 10 GHz from spacecraft to Earth?
A handheld remote sends a signal across a living room to a television, but the signal is easily blocked by a wall. Which band does it emit?
A local weather station tracks rain by sending pulses that reflect from droplets and hail. Which band is most likely being used?
A station broadcasts music to car antennas across a city. Which region of the electromagnetic spectrum carries the signal?
A dentist needs an image showing a patient’s teeth below the gumline. Which band is used for the exposure?
An indoor tanning booth uses lamps that imitate one hazardous part of sunlight. Which band are those lamps designed to emit?
Firefighters use a camera to find warm bodies through smoke in a dark room. Which band should the camera detect?
A checkout scanner sweeps a red beam across a barcode so a detector can read the reflected pattern. Which band is the red beam in?
A home wireless router sends data at 2.4 GHz or 5 GHz through a room. Which band contains those signals?
A nuclear medicine camera detects photons from a tracer inside a patient’s body. Which band is commonly detected?
A museum uses a blacklight to make certain minerals and security markings fluoresce. Which band is the lamp emitting?
Astronomers map cold hydrogen gas using its 21 cm emission. Which band of the spectrum is this?
A compound microscope uses lenses and a lamp so students can see stained cells directly. Which band forms the image?
A satellite sensor needs data about ocean winds below hurricane clouds. Which band is especially useful?
Airport security needs a noninvasive image of objects inside a suitcase. Which band is used in many baggage scanners?
Why can a microwave oven heat soup in a glass bowl while the glass lets much of the radiation pass through?
A radio telescope can keep observing on a cloudy night when a visible-light telescope cannot. Which property makes that possible?
A thermal camera shows a person in a dark room. Why is infrared the useful band?
Why can x-ray radiography show a broken bone inside a hand?
A hospital uses upper-room ultraviolet germicidal irradiation. What makes ultraviolet useful for this job?
Why can gamma radiation sterilize medical devices after they are sealed in packaging?
Why is visible light the correct band for a standard classroom microscope?
A radar altimeter measures sea-surface height by timing pulses sent from a satellite and reflected back. Why use microwaves?
Why does an infrared heat lamp warm food at a serving counter?
Why does sunscreen focus on blocking ultraviolet radiation rather than radio waves from nearby transmitters?
A long-wave radio signal can bend around hills better than a narrow beam of visible light. Which wave property explains this?
Security scanners can distinguish dense tools inside a bag from clothing. Why are x-rays suited to this job?
A cell tower emits hundreds of watts at Hz, while a small UV lamp emits only a few watts at Hz. Why can only the UV photons break some skin bonds?
A very bright red laser and a dim ultraviolet lamp shine on separate samples. The UV lamp is more likely to cause chemical bond damage. What matters most?
A microwave oven can burn tissue by heating water, but gamma radiation is an ionizing hazard even at much smaller absorbed amounts. Why?
Two beams deliver the same power per square meter: one infrared and one x-ray. Which beam has the greater ionizing hazard, and why?
A tanning bed may use less total power than a bright gym lamp, yet it poses a stronger skin-DNA risk. Which explanation is correct?
A weak x-ray tube and a strong AM radio transmitter are compared. Which statement correctly separates photon energy from intensity?
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Race through questions at your own speed.
Same question on every screen. Fastest wins.
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Reflection and Plane Mirrors
40 questions
