I have some quetions for you

Question

1: What is the wavelength of an electromagnetic wave?

here is no wavelength -- it is just a wave

There is a whole spectrum of possible wavelengths

Two centimeters

2: What do different wavelengths represent?

Speed

Brightness

Colors

3: Why does light bend when it goes through glass at an angle?

It goes faster, causing the beam to bend

It goes slower, causing the beam to bend

Light can't pass through glass

4: Are x-rays dangerous?

Only to doctors and dentists

Only if you get too many exposures

If you are a shoe salesman

5: How can you detect x-rays?

With special film

With an x-ray machine

You can't -- they go through everything

Answer 1

There is a whole spectrum of possible wavelengths

Colors

Only if you get too many exposures

With special film or With an x-ray machine

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was this a joke ?