When a Parallel Beam of Light Is Diffracted at a Single

question 26

Multiple Choice

When a parallel beam of light is diffracted at a single slit,

• A)the shadow is always sharp.
• B)the narrower the slit,the narrower the central diffraction maximum.
• C)the narrower the slit,the wider the central diffraction maximum.
• D)the width of the central diffraction maximum is independent of the width of the slit.
• E)None of these is correct.

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Definitions:

Birth Rate

The number of live births per thousand of population per year.

Population

The total set of individuals or items of interest for statistical, analytical, or research purposes.

Per Annum

An expression meaning "for each year," used to describe rates or amounts calculated on an annual basis.

Rate Of Return

The gain or loss on an investment over a specified time period, expressed as a percentage of the investment’s cost.