What is thermal radiation? How does it differ from the other forms of electromagnetic radiation?
What will be an ideal response?
Electromagnetic waves are characterized by their frequency and wavelength ? . These two properties in a medium are related by ? = c / v where c is the speed of light in that medium.
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An IR autofocus system has emitter and detector apertures separated by 1cm and modeled as pin holes. The light reflected from an object at range r casts a spot that is detected at a displacement of 0.1mm from the detector axis. The detector lies 0.5cm behind the pin hole. The value of r equals _____ (x.x m)
Fill in the blank(s) with the appropriate word(s).
Describe a basic outline of how you would organize a low-cost (less than $10,000 annually) wellness program.
What will be an ideal response?
At the breakeven point
a. total costs equal total revenue. b. total costs equal fixed costs. c. the firm makes a profit. d. total costs equal variable costs. e. all of these.
Which of these objects have a mass of approximately one gram?
A) Large bolt B) Birds feather C) Small paper clip D) None of these