When You Look Through a Sheer Curtain at a Distant

question 26

Multiple Choice

When you look through a sheer curtain at a distant street lamp, you see a pattern of coloured spots of light.This occurs by:

• A)polarisation of light in scattering and partial absorption by the threads.
• B)interference of light waves that pass through the threads with light waves that pass through the openings between the threads.
• C)refraction of light waves differentially in the cylindrical threads.
• D)diffraction of light waves passing through the two dimensional pattern of openings between the threads.
• E)reflection of light waves by the sides of the threads.

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Definitions:

Impulse

In physics, the product of force and the time over which it is applied, resulting in a change in momentum.

Isotonic Contraction

A type of muscle contraction in which the muscle changes length while the tension within the muscle remains the same, resulting in movement.

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A key end-product of glycolysis that can enter the Krebs cycle or undergo fermentation in the absence of oxygen.

Lever Systems

Mechanical systems comprising a lever (rigid rod) that moves around a fixed point (fulcrum) to produce movement, utilized in describing bone and muscle actions.