Explain the concept of intensity of electromagnetic waves.

What is meant by Fraunhofer lines?

Write the uses of Radio waves.

Write the uses of Micro waves.

(i) How is the speed of Electromagnetic waves in vacuum determined by the electric and magnetic fields? and
(ii) Do Electromagnetic waves carry energy and momentum?

(i) In which situation is there a displacement current but no conduction current?
(ii) Find the displacement current across the plate of the capacitor whose charging current is 0.25 A.

Arrange the Electromagnetic waves in order of
(i) increasing frequency
(ii) decreasing wavelength.

Why are Infrared radiation referred to as heatwaves? Name the radiations, which are next to these radiation having
(i) shorter λ
(ii) longer λ.

Which part of the Electromagnetic spetrum spectrum is used in operating a RADAR and why?

Which part of Electromagnetic is absorbed from sunlight by ozone layer?
(i) Write its source and
(ii) mention its uses.

Draw a diagram depicting oscillating electric and magnetic field of an electromagnetic wave.

What is the orgin of displacement currtent?

What is the ratio velocities of the microwaves and radio waves?

How are electromagnetic waves classified?

What is an emission spectrum?