Explain the term critical frequency, Physics

Assignment Help:

Explain the term 'critical frequency' in relation to sky wave propagation of electromagnetic waves.

On a particular day, the maximum frequency reflected from the ionosphere is 10 MHz on another day, it was found to reduce to 8 MHz calculate the ratio of the maximum electron densities of the ionosphere on the two days


Related Discussions:- Explain the term critical frequency

Determine density of gold, Trying to make an interesting pattern, an artist...

Trying to make an interesting pattern, an artist slowly pours 1.00 cm 3 of liquid gold onto a large block of ice at 0.00°C. While being poured, the liquid gold is at its melt

Internal resistance of circuit, Internal Resistance of Circuit: As ment...

Internal Resistance of Circuit: As mentioned earlier in the section on batteries, every source of electricity, such as a cell or generator has resistance to current flow called

Magnetism, what is the magnetic field at a distance l from the centre of th...

what is the magnetic field at a distance l from the centre of the circle of radius r which carries a current i

Formation of stationary waves in stretched strings, Illustrate the formatio...

Illustrate the formation of stationary waves in stretched strings and thus deduce the laws of transverse waves in stretched string.

Estimate the specific heat for the substance, It takes 46.0 J to raise the ...

It takes 46.0 J to raise the temperature of an 10.1 g piece of unknown substance from 13.0 o Cto  40.1 o C. What is the specific heat for the substance?

Determine instantaneous acceleration vector of an object, For an object mov...

For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is: w)  tangent to the path of motion x)  equal to zero y)

Mediocrity principle, Mediocrity principle: The principle that there i...

Mediocrity principle: The principle that there is nothing specifically interesting regarding our place in space or time, or about ourselves. This principle possibly first made

Describe how optical fibers used as hydrophones, Describe how optical fiber...

Describe how optical fibers used as hydrophones. Optical fibers are employed as hydrophones for sonar and seismic applications. Each hydrophone systems along with more than one

Force operating on and acceleration of the block, A block of mass m is rest...

A block of mass m is resting on a piece of smooth paper. The block has coefficient of static and kinetic friction μ s , μ k with the paper, correspondingly. You jerk the paper hor

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd