A 35-Cm-Long Microscope Glass Slide Has One Edge in Contact with with a Flat

question 139

Multiple Choice

A 3.5-cm-long microscope glass slide has one edge in contact with a flat plane of glass, while the other edge is slightly raised due to the insertion of a thin piece of paper. Sodium light of wavelength 589 nm is normally incident on the glass from above and interference fringes are observed by reflection with a regular spacing of 0.22 mm. Calculate the thickness of the piece of paper.

• A) 9.4 × 10^-5 m
• B) 5.5 × 10^-5 m
• C) 2.4 × 10^-5 m
• D) 4.7 × 10^-5 m
• E) None of these is correct.

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Definitions:

Performance

The act of executing a task or function, often measured against predefined standards.

Goal Specificity

The extent to which a goal is detailed, explicit, and clear as opposed to vague or general.

Expectancy

The belief or anticipation of the likelihood that something will occur, often related to motivation theory.

Instrumentality

The perceived relationship between performance and the attainment of certain outcomes, in the context of motivation theories.