The electric field associated with an e.m. wave in vacuum is given by
The electric field associated with an e.m. wave in vacuum is given by E = i 40 cos (kz -…
8 years ago
Questions
The decreasing order of wavelength of infrared, microwave, ultraviolet and gamma
The decreasing order of wavelength of infrared, microwave, ultraviolet and gamma rays is Options (a) microwave, infrared, ultraviolet, gamma rays…
8 years ago
The electric and magnetic field assiciated with an E.M. wave
The electric and magnetic field associated with an E.M. wave, propagating along the +z axis, can be represented by Options…
8 years ago
which of the following statement is false for the properties of electromagnetic waves?
which of the following statement is false for the properties of electromagnetic waves? Options (a) Both electric and magnetic field…
8 years ago
The electric field part of an electromagnetic wave in a medium is represented by
The electric field part of an electromagnetic wave in a medium is represented by Ex = 0 Ey = 2.5…
8 years ago
If c is the velocity of light in free space, the time taken by light to travel
If c is the velocity of light in free space, the time taken by light to travel a distance x…
8 years ago
The velocity of electromagnetic radiation in a medium of permittivity ε₀
The velocity of electromagnetic radiation in a medium of permittivity ε₀ and permeability μ₀ is given by Options (a) √(ε₀…
8 years ago
The condition under which a microwave oven heats up a food item containing
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is Options (a)…
8 years ago
The electromagnetic waves detected using a thermopile and used in physical therapy
The electromagnetic waves detected using a thermopile and used in physical therapy are Options (a) gamma radiations (b) x-rays (c)…
8 years ago
In electromagnetic spectrum, the frequencies of γ-rays and x-rays and ultraviolet rays
In electromagnetic spectrum, the frequencies of γ-rays and x-rays and ultraviolet rays are denoted by n₁,n₂ and n₃ respectively, then…
8 years ago