microwaves are used as Radar. why?
prasanjeet kumar , 10 Years ago
Grade 8
General Physics> microwaves are used as Radar. why?
1 Answers
Apoorva Arora
Last Activity: 10 Years ago
A typical radio wave of say 300MHz(FM radio is cut off at 100MHz) frequency has a wave length of 1m at this frequency and lower, the wave will diffract(bend around) a typical plane even a jumbo jet.
Microwaves at 10GHz (frequency) have a wavelength of 3 cm so they bounce off even the smallest aircraft(stealth planes are an exception of course). So they are much more suited to avoid getting bombed.
Microwaves at 10GHz (frequency) have a wavelength of 3 cm so they bounce off even the smallest aircraft(stealth planes are an exception of course). So they are much more suited to avoid getting bombed.
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free
Enter text here...
Other Related Questions on General Physics
moment of inertia of a equilateral triangle about an axis passing through centre and perppendicular to the plane
General Physics
1 Answer Available
Last Activity: 2 Year ago(s)
. Because of the rotation of the earth, a plumb bob may not hang exactly along the direction ofthe earth’s gravitational pull (its weight) but deviates slightly from this direction. Calculate thedeviation (a) at 40 latitude, (b) at the poles, and (c) at the equator
General Physics
1 Answer Available
Last Activity: 2 Year ago(s)
The length of a massless rod is measured using vernier callipers having 10 vernier scale divisions and least count of 0.1 mm. Two masses 1.00 ± 0.01 kg and 4.00 ± 0.02 kg are attached to its ends. If reading of vernier scale is 5 divisions coinciding with 1.3 cm, what is the % error in locating centre of mass from lighter mass
General Physics
2 Answer Available
Last Activity: 2 Year ago(s)
A block is kept on x-y plane at a point (2m,3m). It is pushed with a force of magnitude 10 Ntowards point (5m,7m). The force can be represented as?
General Physics
0 Answer Available
Last Activity: 2 Year ago(s)
The phase of particle at t is 70°and another particle is at t is 790° what is wavelength if the distance between two particles is1 m
General Physics
0 Answer Available
Last Activity: 2 Year ago(s)