What is the energy of an ultraviolet photon with wavelength 100 nm? What is the frequency of an ultraviolet photon with wavelength 119 nm? What is the wavelength of a radio photon from an "AM" radio station that broadcasts at 1420 kilohertz?
Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.
- What is the energy of an ultraviolet photon with wavelength 100 nm?
What is the frequency of an ultraviolet photon with wavelength 119 nm?
What is the wavelength of a radio photon from an "AM" radio station that broadcasts at 1420 kilohertz?
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