Questions: 1. What can you observe from the picture below? Explain in detail. Penetrates Earth's Atmosphere? Radiation Type Radio Wavelength (m) 10 Approximate Scale of Wavelength Frequency (Hz) Temperature of objects at which this radiation is the most intense wavelength emitted wwwwwwww Visible 0.5×10 Microwave 10² Infrared 10 1K -272 °C Buildings Humans Butterflies Needle Point Protozoans Molecules Atoms Atomic Nucle -1/2 100 K -173 °C Ultraviolet X-ray 10⁰ 10-10 10,000 K 9,727 "C -2 Gamma ray 102 10,000,000 K -10,000,000 "C -2
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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