An Airplane Is Made Invisible to Radar by Coating It

question 45

Multiple Choice

An airplane is made invisible to radar by coating it with a 7.0 mm thick layer of an antireflective polymer with the index of refraction n = 1.5.What is the maximum wavelength of radar waves for which the plane is made invisible?

• A)3.0 cm
• B)3.8 cm
• C)4.0 cm
• D)4.2 cm
• E)5.0 cm

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Definitions:

Classical Conditioning

A learning process that involves associating an initially neutral stimulus with a stimulus that elicits a reflexive response, until the neutral stimulus itself elicits that response.

Development

The process of growth, progress, or evolution, often marked by successive stages.

Learning

The acquisition of knowledge, skills, behaviors, or attitudes through experience, study, or teaching.

Conditioned Stimulus

A previously neutral stimulus that, after being repeatedly paired with an unconditioned stimulus, elicits a conditioned response.