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6. Whichof the following EMW's can both penetrate the atmosphere?
- infrared & x-rays
- microwaves & gamma rays
- radio & visible
- radio & x-rays
- gamma-rays & visible
7. X-ray have a frequency of approx of 10^4
8. The order from biggest wavelength to smallest is...
- radio, infrared, microwave, visible, ultraviolet, gamma, x-ray
- ultraviolet, x-ray, infrared, visible, radio, microwave, gamma
- radio, microwave, infrared, visble, ultraviolet, x-ray, gamma
- gamma, x-ray, ultraviolet, visible, infrared, microwave, radio
- microwaves, gamma rays, x-rays, visible, infrared, radio, ultraviolet