A Grating Has 450 Lines Per Millimeter

question 68

Multiple Choice

A grating has 450 lines per millimeter.What is the highest order m that contains the entire visible spectrum from 400 nm to 700 nm?

• A)m = 2
• B)m = 3
• C)m = 4
• D)m = 5
• E)m = 6

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Definitions:

Positive Pulses

Positive pulses are brief increases in electrical voltage or current that move from a baseline towards a higher value in a positive direction.

Voltage

The electrical potential difference between two points, or the force that drives an electric current between those points.

Armature

The rotating part of an electric machine, such as a motor or generator, around which the electromotive force is generated.

Pulse-width

The duration of time that a pulse in a pulse modulation system is at a high or significant level, important in determining signal characteristics.