[Answered] A helium-neon laser ( = 632.8 nm) is used to calibrate a diffraction grating. If the first-order ...

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Author Question: A helium-neon laser ( = 632.8 nm) is used to calibrate a diffraction grating. If the first-order ... (Read 58 times)

craiczarry

Hero Member
Posts: 527

on: Jul 28, 2018

A helium-neon laser ( = 632.8 nm) is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.5, what is the line spacing, d?
a. 1.81 106 m
b. 1.00 105 m
c. 1.00 104 m
d. 1.31 106 m
e. 6.76 107 m

Question 2

The direction of the Moon's orbit about Earth is
a. westward.
b. eastward.
c. clockwise, as viewed from above Earth's North Pole.
d. none of these.

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Marked as best answer by a Subject Expert

Kdiggy

Sr. Member
Posts: 340

Reply #1 on: Jul 28, 2018

Answer to Question 1

a

Answer to Question 2

b

craiczarry

Hero Member
Posts: 527

Reply #2 on: Jul 28, 2018

Kdiggy

Sr. Member
Posts: 340

Reply #3 on: Jul 28, 2018

You're welcome

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