Multiple choice: ?

Question

1) which of the following would have the shortest wavelength?

A) ultraviolet light

B) infrared radiation

C) visible light

D) an x-ray

2)diffraction of a wave cause

A) motion of waves in straight lines

B) reflection of wave at right angles to a surface

C) bending of a wave around a surface

D) all of the above

Answer 1

I believe the answers are A and D.

Answer 2

The answers are D and C.

For question one, remember that the higher the frequency, the smaller the wavelength. Since X-rays have the highest frequency, they have the smallest wavelength.

For the second question, quoting from wikipedia, "Diffraction is normally taken to refer to various phenomena which occur when a wave encounters an obstacle. It is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings."

Therefore the answer is C.

More on the EM spectrum:

http://en.wikipedia.org/wiki/Em_spectrum

Specifically the frequency and wavelengths:

http://en.wikipedia.org/wiki/Image:EM_Sp...

More on diffraction:

http://en.wikipedia.org/wiki/Diffraction

Answer 3

1) D) an x-ray  (10^ -10 m)

2) C) bending of a wave around a surface