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1. TV remote এর Carrier frequency -র range কত?
- A. < 100 MHZ
- B. < 100 MHZ
- C. < 100 MHZ
- D. < 100 MHZ
Answer: Option D
Explanation:
Infrared light is even used to heat food sometimes - special lamps that emit thermal infrared waves are often used in fast food restaurants! Shorter, near - infrared waves are not hot at all - in fact you cannot even feel them. These shorter wavelengths are the ones used by your TV's remote control.
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