A Monochromatic Light Source Illuminates a Double Slit and the Resulting

question 1

Multiple Choice

A monochromatic light source illuminates a double slit and the resulting interference pattern is observed on a distant screen. Let d be the center-to-center slit spacing, a the individual slit width, D the screen-to-slit distance, and ℓ the adjacent dark line spacing in the interference pattern. The wavelength of the light is then:

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Definitions:

Overregularization

A language acquisition error where children apply general grammar rules too widely.

First Word

The initial instance of meaningful spoken language produced by a child.

Preoperational

A stage in Piaget's theory of cognitive development (approximately ages 2-7) where children begin to engage in symbolic play but lack the ability to perform operations or use logic.

Coax

To persuade someone gently and persistently to do something or to obtain something by using flattery or gentle urging.