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MODEL PAPER 9 — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMODEL PAPER 92 Marks
Question
Which of the following electromagnetic waves has (a) minimum wavelength, and (b) minimum frequency? Write one use of each of these two waves.
Infrared waves, Microwaves, $\gamma$-rays and X-rays
✓

Answer

The minimum wavelength or Maximum frequency has maximum energy and vice versa, $\gamma$ - Ray has maximum energy so it has a minimum wavelength and Microwaves have minimum energy so it has a maximum frequency.
Use of electromagnetic waves: 
Infrared waves: Heat-sensitive thermal imaging cameras, Remote controls. 
Microwaves: microwave radio relay networks, radar, satellite, and spacecraft communication. 
$\gamma$-rays: Used as tracers in medicine, Astronomy.
X-rays: checking fracture

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