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Electromagnetic spectrum: Quiz


Question 1: Sunburn, for example, is caused by the disruptive effects of UV radiation on skin cells, which is the main cause of skin cancer, if the radiation irreparably damages the complex ________ molecules in the cells (UV radiation is a proven mutagen).

Question 2: Above infrared in frequency comes ________.
X-rayMicrowaveVisible spectrumGamma ray

Question 3: For example, many hydrogen ________ emit a radio wave photon which has a wavelength of 21.12 cm.

Question 4: Low-intensity microwave radiation is used in ________, although this is at intensity levels unable to cause thermal heating.
WiMAXBluetoothSatellite Internet accessWi-Fi

Question 5: Generally, EM radiation is classified by wavelength into radio wave, microwave, infrared, the visible region we perceive as light, ultraviolet, ________ and gamma rays.
Ionizing radiationX-rayRadiation therapyNuclear fusion

Question 6: The use of the radio spectrum is regulated by many governments through ________.
Frequency allocationElectromagnetic spectrumAmateur radio frequency allocationsBroadcast license

Question 7: Microwave energy is produced with klystron and magnetron tubes, and with solid state ________ such as Gunn and IMPATT devices.
Vacuum tubeSemiconductor deviceDiodeElectronic component

Question 8: The long wavelength limit is the size of the ________ itself, while it is thought that the short wavelength limit is in the vicinity of the Planck length, although in principle the spectrum is infinite and continuous.
UniverseBig BangRedshiftTime

Question 9: If radiation having a frequency in the visible region of the EM spectrum reflects off of an object, say, a bowl of fruit, and then strikes our eyes, this results in our ________ of the scene.
Optic tractVisual perceptionVisual cortexVisual system

Question 10: Microwaves are waves which are typically short enough to employ tubular metal ________ of reasonable diameter.
WaveguideWaveguide (electromagnetism)Electromagnetic radiationOptics


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