Exams › NEET › Physics

Direction of propagation of electromagnetic waves is perpendicular to Electric field and Magnetic field. Hence, direction is given by vector S̅ = E̅ × H̅ / μ₀.

1. Direction is given by vector S̅ = E̅ × H̅ / μ₀.
2. Direction is given by vector S̅ = H̅ × E̅ / μ₀.
3. Direction is given by vector S̅ = E̅ × H̅.
4. Direction is given by vector S̅ = H̅ × E̅.

Correct answer: Direction is given by vector S̅ = E̅ × H̅ / μ₀.

Solution

The direction of propagation of electromagnetic waves is given by the Poynting vector S̅, which is defined as S̅ = E̅ × H̅ / μ₀. This represents the cross product of the electric field (E̅) and the magnetic field (H̅), divided by the permeability of free space (μ₀).

Related NEET Physics questions

• Who named the negatively charged particles present in cathode rays as electrons?
• Name the high energetic invisible electromagnetic wave which helps in the study of structure of crystals.
• Which of the following type of radiations are radiated by on oscillating electric charge?
• Microwaves are detected by
• Threshold wavelength of tungsten is 2300 angstrom. If ultraviolet light of wavelength 1800 angstrom is incident on it, then the maximum kinetic energy of photoelectrons would be?
• Name the rays or waves of wavelength nearly \( 0.1 n m \)

⚔️ Practice NEET Physics free + battle 1v1 →