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4 cards from this section. Quick, good the night before a test.
What is the primary function of eyeglasses?
Think about how lenses help adjust vision.
What type of lens is used to correct nearsightedness?
Consider how light needs to diverge for clear distant vision.
What type of lens do eyeglasses for farsightedness use?
Think about what lenses need to do for focusing light correctly.
True or False: Fibers used in fiber optics can transmit light signals.
Consider how data is transmitted in modern telecommunications.
Daniel needs reading glasses. Explain how both concave and convex lenses work to correct his vision. What type of lens will he need?
Consider his ability to see things close up.
A fiber optic cable transmits data over 100 miles. Discuss the role of total internal reflection in maintaining the signal strength over such distances. Why is it preferable to use light signals instead of electrical signals?
Think about how electricity can lose strength over distance.
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