Problem 11

The Earth is 93,000,000 miles from the sun. If light travels at 299,800 km per second how long does it take the light from our sun to reach us?

1 mile = 1.609 km

Problem 12

Explain how infra-red radiation is used to cook food in a very common kitchen appliance. Which is it?

(its not a microwave!)


Problem 13

Infra-red spectrophotometers can be used to analyze a sample based upon what spectroscopy principle? What kind of information is obtained?


Problem 14

Explain the meaning of the term monochromatic.


Problem 15

How does microwaves affect water when placed in a microwave oven. Why does this cause the water to heat up?