Thank you for your help. A helium-neon laser emits red light at 633nm which is d

Question

Thank you for your help. A helium-neon laser emits red light at 633nm which is directed through a diffraction (interference) grating. The first order maximum appears at an angel of 35 degrees from a normal to the surface of the grating. What is the distance between the slits on the grating? How many slits are there in a mm of the grating, namely what is the rated slits per millimeter for the grating. Will you be able to view the second order maximum of this laser light with this grating, and why or why not?

Explanation / Answer

a)

dsin=m

dsin35=1*633*10^-9 => d= 1.104*10^-6 m

b)

no of slits = 1/d = 1/(1.104*10^-6) = 906 slits in 1mm

c)

dsin=m

1.104*10^-9*sin=2*633*10^-9

These calculations shows is imaginary. This is the reason why we can’t see second order maximum.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.