Here are the reasons why one might (at any age) go to see an ob/gyn or midwife: 1  To get birth control. 2  To have STI testing -- if you're experiencing symptoms, or you've had unprotected sex, you should probably have some STI tests done.
A: Gamma rays are used in many different ways; one of the most common uses is inspecting castings and welds for defects that are not visible to the naked eye. Another common use of gamma rays is in the treatment of certain types of cancer.
No, not in light sabers! For one thing, lasers can be used in a device called a spectrometer. A spectrometer uses light to identify the chemical composition of matter. For example, as light passes through a gas, the gas soaks up certain colors, or wavelengths, of light. Different gases absorb different wavelengths.irst, the light from a laser contains exactly one color or wavelength rather than a lot of different wavelengths. Scientists say that laser light is  monochromatic , meaning of one color. Flash is required to view this animation. Second, all the wavelengths are in phase.