Which of the following statements are true?A. | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) $1$. The speed of light in a vacuum is a universal constant $(c \approx 3 	imes 10^8 \ m/s)$ and is independent of the direction of propagation,h

Vedclass · Accepted Answer

$C$ and $D$ only

Vedclass · Answer

(D) $1$. The speed of light in a vacuum is a universal constant $(c \approx 3 	imes 10^8 \ m/s)$ and is independent of the direction of propagation,hence statement $A$ is false.$2$. The speed of light in a medium depends on the refractive index,which varies with the wavelength of light (phenomenon of dispersion),hence statement $B$ is false.$3$. According to the postulates of special relativity,the speed of light is independent of the motion of the source,hence statement $C$ is true.$4$. The speed of light in a medium is determined by the properties of the medium (permittivity and permeability) and is independent of the intensity of the light,hence statement $D$ is true.$5$. Therefore,statements $C$ and $D$ are correct.

Similar Questions

For electromagnetic waves,the phase difference between the $\vec{E}$ and $\vec{B}$ vectors (for the region far from the source) is......

Which of the following do not require a medium for transmission?

If $c$ is the speed of electromagnetic waves in vacuum,its speed in a medium of dielectric constant $K$ and relative permeability $\mu_r$ is:

Statement-$I$ :- During propagation of electromagnetic wave,$\vec{E}$,$\vec{B}$ and direction of propagation are perpendicular to each other.
Statement-$II$ :- During propagation of electromagnetic wave,the energy density due to electric and magnetic fields are equal.

Light waves are which type of waves?

Vedclass Test Series

Exam Paper Generator

Online Exam Module