A ray of light from a monochromatic point sou | vedclass

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

Question

(D) The optical path length is defined as the product of the refractive index of the medium and the geometric distance traveled by the light.In vacuum

Vedclass · Accepted Answer

is increased by $(n-1) t$.

Vedclass · Answer

(D) The optical path length is defined as the product of the refractive index of the medium and the geometric distance traveled by the light.In vacuum (or air),the optical path for a distance $t$ is $t_{opt} = 1 	imes t = t$.When a mica film of thickness $t$ and refractive index $n$ is introduced,the light travels a distance $t$ through the film.The optical path through the film is $t'_{opt} = n 	imes t = nt$.The change in optical path is $\Delta = t'_{opt} - t_{opt} = nt - t = (n-1)t$.Since $n > 1$,the optical path increases by $(n-1)t$.

$A$ ray of light from a monochromatic point source of light is incident at a point on the screen. If a thin mica film of thickness $t$ and refractive index $n$ is introduced in its path,then the optical path

Similar Questions

Two point sources separated by $d = 5\, \mu m$ emit light of wavelength $\lambda = 2\, \mu m$ in phase. $A$ circular wire of radius $R = 20\, \mu m$ is placed around the sources as shown in the figure. Determine the nature of interference at points $A, B, C,$ and $D$.

Two coherent sources are kept at a distance of $d = 2 \lambda$. $A$ large screen is placed perpendicular to the line joining the sources. Determine the total number of maximas observed on the screen. (Here,$\lambda$ is the wavelength of light.)

Which of the following is the path difference for destructive interference?

The displacements of two interfering light waves are given by $y_1 = 4 \sin \omega t$ and $y_2 = 3 \sin (\omega t + \frac{\pi}{2})$. What is the amplitude of the resultant wave?

Two sources of waves are called coherent if

Vedclass Test Series

Exam Paper Generator

Online Exam Module