erything radiates electromagnetic energy. Classify the object with its peak ligth emission. An average star (like sun): _____ Element of your oven at max: _______ Bright incandescent light bulb: Infrared and_______ Hot volcano lava: ______ Human body: ______ Animals: ______ Gamma emission emitted by a radioactive decay: Hard X-Ray and ______ The radiant heat remaining from the Big Bang: ______ Black light: ______
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.
An average star (like sun): _____
Element of your oven at max: _______
Bright incandescent light bulb: Infrared and_______
Hot volcano lava: ______
Human body: ______
Animals: ______
Gamma emission emitted by a radioactive decay: Hard X-Ray and ______
The radiant heat remaining from the Big Bang: ______
Black light: ______
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