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

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Write the definition of self inductance. What is depends on and state its unit and dimensional formula.
Given a uniform electric field$\overrightarrow{\text{E}}$: 5 x 103 $\hat{i}$ N/C, find the flux of this field through a square of l0 cm on a side whose plane is parallel to the y-z plane. What would be the flux through the same square if the plane makes a 300 angle with the x-axis?
Find the greatest length of an organ pipe open at both ends that will have its fundamental frequency in the normal hearing range (20Hz-20,000Hz). Speed of sound in air = 340m/s.
State Bohr's quantization condition of angular momentum. Calculate the shortest wavelength of the Bracket series and state to which part of the electromagnetic spectrum does it belong.
A nut becomes loose and gets detached from a satellite revolving around the earth. Will it land on the earth? If yes, where will it land? If no, how can an astronaut make it land on the earth?
In RL and RC series AC circuits the resonance phenomenon isn't possible. Why?
Calculate the mass of 1cm3 of oxygen kept at STP.
Write the definition of electric current and ampere (A) and different units of electric current.
A short bar magnet placed with its axis at $30^{\circ}$ with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to $4.5 \times 10^{-2} J$. What is the magnitude of magnetic moment of the magnet?
Name the semiconductor device that can be used to regulate an unregulated dc power supply. With the help of I-V characteristics of this device, explain its working principle.