Please write detail solution.. 4 Detection of exoplanets: the Doppler effect An
ID: 292474 • Letter: P
Question
Please write detail solution..
4 Detection of exoplanets: the Doppler effect An exoplanet is a planet outside our solar system, graviting around a star. They form a system with a barycenter G For simplicity, we consider the movement of the planet to be circular around G. 1 Describe the movement of the star. (no calculation needed) 2l Suppose that the star emits a single wavelength at 550nm What would be the wavelength(s) detected on earth? 3/ What would be detected for a system without an exoplanet? EarthExplanation / Answer
1ans:) When a planet orbits a star, the star wobbles back and forth slightly because of the planet's gravitational force.the movement of the star is measured through the wavelength, of the light from the star. which gets shifted if there's a planet present (using Doppler Effect).
2ans:) The wavelength that emits by the star will not be same when it comes to earth it will increase, due to (DopplerEffect).because the gravitational red shift will be observed on earth and this happens due to gravitational field of the earth is stronger the closer you get to its surface, causing 'TIME to PASS SLOWER'.
3ans:) A star can be detected.