Advertisements
Advertisements
Question
What are electromagnetic waves?
Solution
- Electromagnetic waves are non-mechanical waves that move with speed equals to the speed of light (in a vacuum).
- It is a transverse wave.
APPEARS IN
RELATED QUESTIONS
Can an electromagnetic wave be deflected by an electric field or a magnetic field?
A capacitor is connected to an alternating-current source. Is there a magnetic field between the plates?
What is displacement current?
Write down the properties of electromagnetic waves.
Which of these mechanisms can be used to produce electromagnetic waves?
Wavelength λ and wave vector k are related by ______.
Which of the following electromagnetic radiations has the smallest wave length?
For a plane electromagnetic wave propagating in the x-direction, which one of the following combinations gives the correct possible directions for the electric field (E) and magnetic field (B) respectively?
The intensity of the light from a bulb incident on a surface is 0.22 W/m2 . The amplitude of the magnetic field in this light-wave is ______× 10–9 T.
(Given: Permittivity of vacuum ε0 = 8.85 × 10–12 C2 N–1 – m–2, speed of light in vacuum c = 3 × 108 ms-1)
Sunlight falls normally on a surface of area 36 cm2 and exerts an average force of 7.2 × 10-9 N within a time period of 20 minutes. Considering a case of complete absorption the energy flux of incident light is ______.
