1. What can you observe from the picture below? Explain in detail. Penetrates Earth's Atmosphere? Radiation Type Radio Wavelength (m) 10³ Approximate Scale of Wavelength Frequency (Hz) Temperature of objects at which this radiation is the most intense wavelength emitted Y 104 N Microwave 10-² 108 wwwwwww Infrared Visible 10-5 0.5x10-6 Buildings Humans Butterflies Needle Point Protozoans Molecules Atoms Atomic Nuclei 1K -272 °C 10¹2 100 K -173 °C 10¹5 N 10,000 K 9,727 °C Ultraviolet X-ray 10-8 10-10 1016 10¹8 Gamma ray 10-12 10,000,000 K -10,000,000 °C 102⁰
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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