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Electromagnetic Waves
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Which EM wave helps our body to produce a certain vitamin that is essential in our body's calcium absorption?
ultraviolet
In radio communication and broadcasting, what device is used to convert sound waves to electrical signals?
microphone
Which layer of the atmosphere helps radio waves to bounce back and enable these radio communication signals to be heard over vast distances?
ionosphere
Radio and sound waves both travel at the speed of light. True or False
False
A mobile phone works by transmitting radio waves which are received by cell sites to a target mobile phone. True or False
False
Which EM wave is used in fiber optic communication, photography and illumination?
visible light
In radio communication, what does FM stand for?
frequency modulation
To which EM wave are you contact with while watching your favorite noon time show on TV?
radio
Which EM wave is used in checking signature on passbook?
ultraviolet
What term refers to a cancer treatment that uses high dose of radiation to treat cancer and shrink tumors?
radiotherapy or radiation therapy
Which EM wave is used to treat cancer?
gamma
These are long, thin strands arranged in bundles and are used in communication.
fiber optics or optical fibers
Long wavelength X-rays can penetrate the flesh and our bones. True or False
False
Which EM wave is used in sterilizing water from drinking fountains?
ultraviolet
What term refers to the use of light in medical treatment of a variety of ailments such as topical infections?
phototherapy
Which EM wave is used to heat or cook food?
microwave
Which EM wave is used to show the temperature variation of the body?
infrared
What does RADAR mean?
radio detection and ranging


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