Thursday
April 24, 2014

Homework Help: Physics

Posted by Jon on Friday, April 11, 2008 at 4:14pm.

1)Which of the following statements about X rays is incorrect?

A)x rays darken photographic plates
B)x rays can penetrate soft body tissue
C)the kinetic energy of high speed electrons is converted to x rays when they collide with matter.
D)x rays can easily penetrate bones and any thick material

I got D

2)An electromagnetic wave has a frequency of 2.90 x 10^14 Hz. What is the wavelength of the wave?

3.00 x 10^8/2.90 x 10^14
= 1.03 x 10^-6 m

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