A Very Fine Thread Is Placed Between Two Glass Plates

question 12

Multiple Choice

A very fine thread is placed between two glass plates on one side and the other side is touching to form a wedge. A beam of monochromatic light of wavelength 600 nm illuminates the wedge and 178 bright fringes are observed. What is the thickness of the thread?

• A) 22.3 μm
• B) 26.7 μm
• C) 32.3 μm
• D) 53.3 μm
• E) 76.3 μm

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Definitions:

Inferior Good

A type of good for which demand decreases as the income of the consumer increases, contrary to what happens with a normal good.

Net Supplier

An entity that provides more of a good or service to the market than it consumes from it.

Normal Good

A category of product that sees a rise in demand as the consumer's income grows, indicating a direct correlation between income levels and demand.

Backward-Bending

Refers to the backward-bending supply curve of labor, indicating that beyond a certain wage level, labor supply decreases as income and substitution effects impact workers' willingness to work.