These observations enable astronomers to determine certain physical characteristics of objects, such as their temperature, composition and velocity . The electromagnetic spectrum consists of much more than visible light. It includes wavelengths of energy that human eyes can’t perceive.30 May 2019
Read moreWhat do astronomers use?
Astronomers study planets, stars, galaxies, and other celestial bodies. They use ground-based equipment, such as radio and optical telescopes, and space-based equipment, such as the Hubble Space Telescope .
Read moreHow do astronomers use electromagnetic waves?
Astronomers use a number of telescopes sensitive to different parts of the electromagnetic spectrum to study objects in space . Even though all light is fundamentally the same thing, the way that astronomers observe light depends on the portion of the spectrum they wish to study.
Read moreDo scientists use electromagnetic spectrum?
NASA’s scientific instruments use the full range of the electromagnetic spectrum to study the Earth, the solar system, and the universe beyond.
Read moreWhat is the structure of an electromagnetic wave?
Electromagnetic waves have crests and troughs similar to those of ocean waves. The distance between crests is the wavelength. The shortest wavelengths are just fractions of the size of an atom, while the longest wavelengths scientists currently study can be larger than the diameter of our planet!
Read moreWhat is electromagnetic wave with diagram?
Electromagnetic waves are shown by a sinusoidal graph . It consists of time-varying electric and magnetic fields which are perpendicular to each other and are also perpendicular to the direction of propagation of waves. Electromagnetic waves are transverse in nature.
Read moreWhat electromagnetic frequency is harmful to humans?
Most mobile operators use from radiofrequency waves in the range up 300 MHz to 3 GHz that can be harmful for human health (1).
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