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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Diffraction grating: to determine the wavelength of laser

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If a is the width of the slits and b the distance between the slits, then a + b is called as _________

a: Grating constant Explanation

Explanation

b: Opacity Explanation

Explanation

c: Focal length Explanation

Explanation

d: Optical activity Explanation

Explanation

If (a + b) < nλ, then

a: nth order spectrum will be absent. Explanation

Explanation

b: n-1 order spectrum will be absent. Explanation

Explanation

c: n-2 order spectrum will be absent. Explanation

Explanation

d: no diffraction pattern will be visible Explanation

Explanation

What is grating Element?

a: Grating element is the sum of slit width and opaque spacing Explanation

Explanation

b: The distance between two consecutive slits Explanation

Explanation

c: This is element by which grating is made Explanation

Explanation

d: Grating element is a device that we use in experiment for the determination of wavelength. Explanation

Explanation

In the diffraction grating experiment, what do the bright spots in the generated pattern represent?

a: Constructive interference of diffracted beams Explanation

Explanation

b: Destructive interference of diffracted beams Explanation

Explanation

c: Absence of interference Explanation

Explanation

d: Scattering of light Explanation

Explanation

A grating is a

a: plane glass plate on which a large number of opaque rulings are drawn at equidistance with a diamond head. Explanation

Explanation

b: a plano-convex lens producing interference pattern Explanation

Explanation

c: a plane glass plate used for polarizing the light Explanation

Explanation

d: source of monochromatic light Explanation

Explanation

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