QI. Calculate the wavelength (in nm) of light -x 10-19 J per photon. In what region of the electromagnetic radiation does with energy this light fall? (1) Fill in the blank with the last three digit of your student number, decimal component in hundredths place. Rewrite. (2) Use insert character only to copy the symbol for wavelength (3) Type the formula in the response box, use insert character for symbols. (4) Substitute values in the formula and actual computed values as final answer with unit (when necessary). (5) Region of electromagnetic spectrum light falls in #1.
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.
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