A Diffraction Grating Is

question 3

Multiple Choice

A diffraction grating is

• A) a filter for imaging.
• B) a device that uses interference to spread light out into different wavelengths.
• C) a complicated series of prisms.
• D) a device that counteracts the effects of chromatic aberration.
• E) the pattern of light resulting from the spectrum of a star.

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Definitions:

Synchronous Speed

The speed at which the magnetic field in an AC motor rotates, dependent on the frequency of the supply current and the number of poles in the motor.

Turning Torque

The torque required to initiate rotation of a body from rest or to maintain rotation at a constant angular velocity.

Maximum Positive Voltage

The highest voltage level in the positive direction that a system or component is designed to handle.

Magnetic North Polarity

The direction in which the north end of a magnet points, aligning with the Earth's magnetic north.