In Struggle: SNCC and the Black Awakening of the 1960s. Cambridge: Harvard University Press, 1995. Collier-Thomas, Bettye, and V. P. Franklin, eds. Sisters in the Struggle: African American Women in the Civil Rights-Black Power Movement. New York: New York University Press, 2001. Dudziak, Mary. Cold War Civil Rights: Race and the Image of American Democracy. Princeton: Princeton University Press, 2002. Gilmore, Glenda.
No, an X-ray is not a mechanical wave. An X-ray is an electromagnetic wave. However, in polar molecules, an X-ray can cause the molecule to vibrate rapidly, just like a microwave oven can.
The soft tissue in your body is composed of smaller atoms, and so does not absorb X-ray photons particularly well. The calcium atoms that make up your bones are much larger, so they are better at absorbing X-ray photons. In the next section, we'll see how X-ray machines put this effect to work.-rays are basically the same thing as visible light rays. Both are wavelike forms of electromagnetic energy carried by particles called photons (see How Light Works for details).