The astronomer would conclude that the star is moving towards Earth. This blue shift indicates that the wavelengths of light from the star are getting shorter, which occurs as an object moves closer to the observer.
More frequency, and more energy.
Ultraviolet rays have shorter wavelengths than infrared rays. Ultraviolet rays have wavelengths shorter than visible light, making them invisible to the human eye, while infrared rays have longer wavelengths.
We know that ultraviolet light, X-rays and gamma rays have wavelengths shorter than visible light.
"shorter"
Shorter wavelengths.
Ultraviolet waves have shorter wavelengths than visible light.
You mean as opposed to those late afternoon sunrises? Sunrises and sunsets are shifted towards the red end of the spectrum because the atmosphere scatters shorter wavelengths more effectively. Because of the angle, light at sunrise and sunset is going through a thicker "slice" of the atmosphere, and the shorter wavelengths get scattered out, while the longer reds and oranges make it through.
No, green wavelengths are shorter than orange wavelengths. In the electromagnetic spectrum, longer wavelengths correspond to colors such as red and orange, while shorter wavelengths correspond to colors like blue and green.
No, infrared waves have longer wavelengths and lower frequencies compared to ultraviolet rays, which have shorter wavelengths and higher frequencies.
X-rays have shorter wavelengths than radio, heat, infra-red, visible light, and ultra-violet.
The wavelengths of incoming solar radiation are shorter than the wavelengths of reradiated heat.