Electromagnetic Waves

Electromagnetic Waves

1.  (A) Which has shorter wavelengths, ultraviolet, or infrared?    (B) Which has higher frequencies?

 

2.  Which travels faster in the vacuum, an infrared ray, or a gamma ray?

 

3.  Is glass transparent or opaque to light having frequencies that match the resonant frequencies of charges in the glass?

 

4.  You can get a sunburn on a cloudy day, but you generally won’t get a sunburn if you are behind a glass window.  This seems backwards.  What is the explanation for this?

 

5.  When you look at the night sky, some stars appear to be brighter than others.  Does that mean those stars emit more light than the dimmer ones?

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