Light is incident normally on a diffraction g | vedclass

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

Question

(D) The diffraction grating equation is given by $(e + d) \sin 	heta_n = n\lambda$,where $(e + d)$ is the grating element,$	heta_n$ is the angle of

Vedclass · Accepted Answer

There is no second order diffraction in this case

Vedclass · Answer

(D) The diffraction grating equation is given by $(e + d) \sin 	heta_n = n\lambda$,where $(e + d)$ is the grating element,$	heta_n$ is the angle of diffraction,and $n$ is the order of diffraction.For the first order $(n = 1)$,we have $\sin 	heta_1 = \frac{\lambda}{e + d} = \sin 32^\circ$.Since $\sin 32^\circ \approx 0.5299$,we have $\frac{\lambda}{e + d} \approx 0.5299$.For the second order $(n = 2)$,the equation becomes $\sin 	heta_2 = \frac{2\lambda}{e + d} = 2 	imes \sin 32^\circ$.Calculating this,$\sin 	heta_2 = 2 	imes 0.5299 = 1.0598$.Since the value of $\sin 	heta_2$ cannot exceed $1$,the second order diffraction is not possible.

Light is incident normally on a diffraction grating through which the first order diffraction is seen at $32^\circ$. The second order diffraction will be seen at

Similar Questions

If $I_0$ is the intensity of the principal maximum in the single slit diffraction pattern,then what will be the intensity when the slit width is doubled?

In a diffraction pattern due to a single slit,the angular width of the central maxima becomes half when the wavelength of the light used is changed from $\lambda$ to $7000 Å$. Then the value of $\lambda$ is (in $Å$)

"The person standing behind the open door inside the room can hear the voice of the person standing on the other side of the door but they cannot see each other". Give an experiment based on the diffraction for this statement.

Maximum diffraction takes place in a given slit for

In a single slit diffraction experiment,when the distance of separation between the slit and the screen is doubled,the angular separation between the fringes

Vedclass Test Series

Exam Paper Generator

Online Exam Module