Home
Class 11
CHEMISTRY
How long would it take a radio wave of f...

How long would it take a radio wave of frequency `6xx10^(3) sec^(-1)` to travel from mars to the earth, a distance of `8xx10^(7)km` ?

Text Solution

Verified by Experts

Distance to be travelled from mars to earth
`=8xx10^(7)km`
`=8xx10^(10)m`
`because` Velocity of `EM` waves `=3xx10^(8)m//sec`
`therefore` Time `=("Distance")/("Velocity")`
`=(8xx10^(10)m)/(3xx10^(8)m//sec^(-1)) = 2.66 xx10^(2)sec`.
Note : Cosmic rays are made of high velocity sub-atomic particle like protons, neutrons etc which enter earth's atmosphere from outer space. They are not `EM` wave.
Promotional Banner

Similar Questions

Explore conceptually related problems

A remote-sensing satellite of earth revolves in a circular orbit at a hight of 0.25xx10^(6)m above the surface of earth. If earth's radius is 6.38xx10^(6)m and g=9.8ms^(-2) , then the orbital speed of the satellite is

An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of the microwave measured by the observer ? (Speed of light =3xx10^(8)ms^(-1))

How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5 xx 10^(8) km.

What is the radius of the path of an electron (mass 9xx10^(-31)kg and charge 1.6xx10^(-19)C ) moving at a speed of 3xx10^(7)m//s in a magnetic field of 6xx10^(-4)T perpendicular to it? What is its frequency ? Calculate its energy in keV. (1eV=1.6xx10^(-19)J)

A planet of radius R=(1)/(10)xx(radius of Earth) has the same mass density as Earth. Scientists dig a well of depth (R )/(5) on it and lower a wire of the same length and a linear mass density 10^(-3) kg m(_1) into it. If the wire is not touching anywhere, the force applied at the top of the wire by a person holding it inplace is (take the radius of Earth =6xx10^6m and the acceleration due to gravity on Earth is 10ms^(-2)