Purchase Solution

Diffraction grating

Not what you're looking for?

Ask Custom Question

1) If a diffraction grating has 6,000 grooves per centimeter, to what angle will the first order constructive interference "line" of the Hydrogen Alpha (red) emission be diffracted?

2) Atoms of the hydrogen gas enveloping a particular star absorb the Hydrogen Alpha wavelength from the white light emanating from the surface of the star and reemit that color in random directions, causing the spectrum received by observers on Earth to have a dark line due to the missing light. (Discovered by Joseph Fraunhoffer) Suppose the measured wavelength of the dark line is found to be 6555 Angstroms. Is the radial motion of the star toward or away from Earth? Compute how fast the star is moving relative to the earth.

Purchase this Solution
Solution Summary

Diffraction grating is featured. The interference line of the hydrogen alpha is examined for emission diffracted.

Solution Preview

1) For single-line sources, the constructive interference fringes of a diffraction grating are given by d*sin(theta) = m(lambda)

d is the distance between pairs of grooves. Here, we have 6000 grooves per centimeter, or 5999 spaces between grooves, giving

d = 1/5999 cm

Lambda is the wavelength of ...

Purchase this Solution
Free BrainMass Quizzes
Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Basic Physics

This quiz will test your knowledge about basic Physics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

The Moon

Test your knowledge of moon phases and movement.

View More Free Quizzes
Related BrainMass Solutions

  • Wave Optics: Diffraction through transmission grating.

    I understand the diffraction grating and all the formulae that describe diffraction with only a grating but I'm not sure how to do calculation when a grating is in combination with a lens.

  • Diffraction of Light: Diffraction Grating

    34665 Diffraction of Light: Diffraction Grating 1. A diffraction grating with 2.10E3 slits per centimeter is used to measure the wavelengths emitted by hydrogen gas.

  • Transmission Diffraction Grating

    186424 Transmission Diffraction Grating Please view the attached document for the diagram and proper formatting of this problem.

  • White Light Diffraction

    40887 White Light Diffraction White light strikes a diffraction grating (540 lines/mm) at normal incidence. What is the longest wavelength that forms a third-order maximum?

  • Diffraction of light: maximums by Grating

    234669 Diffraction of light: maximums by Grating Please solve and explain An array of many identical slits placed close together with uniform spacing is called a grating.

  • resolving power of grating

    The resolving power of a grating is , where N is the total number of slits illuminated and m is the order of the diffraction.

  • Number of lines per centimeter on the grating

    When this light illuminates a certain diffraction grating it produces a first-order principal maximum at an angle of 1.247°. Calculate the number of lines per centimeter on the grating.

  • diffraction angle of a transmission

    3826 diffraction angle of a transmission What is the diffraction angle for the first-order image produced by a transmission grating with 5800 lines/cm illuminated by monochromatic light with a wave length of 4920 angstroms?

  • Light Diffraction

    Using the grating equation when the light incident on the grating normally, For the 480 nm wavelength, assume the diffraction angle is for the third order line: (1) The angular spread is 20 degrees, then the diffraction angle is for the

  • Physics Diffraction Grating: Example Problems

    307192 Physics Diffraction Grating: Example Problems Part 1: The first-order line of 577 nm light falling on a diffraction grating is observed at a 13.6° angle. How far apart are the slits?

View More Related Solutions