Looking at the HR diagram, calculate the escape speed for an object at (a) the s

Question

Looking at the HR diagram, calculate the escape speed for an object at

(a) the surface of the Sun

(b) the surface of a supergiant

(c) the surface of the White Dwarf

Spectral type 106 Alnilam Rigel A Betelgeuse Adhara Deneb Antares 104 Spica A Polaris Spica B -pergian Canopus Arcturus Rigel B 102 Capella A Mira Capella B. Vega Sirius A Aldebaran A Giants Altair Pollux Procyon A Sun 5 Centauri B CAldebaran B 10-2 40 EridaniB Sirius B . . Wolf 1346 10 Barnard's Sta Red dwarfs Ohar Procyon B Van Maanen's Star 10-4 Wolf 486 Note: Star sizes are not to scale 30,000 20,000 9,999 5009 000 2000 Temperature (K)

Explanation / Answer

Formula to find escape velocity is

2GM÷R

Where respective terms have the usual meaning.

(a) Escape velocity from the surface of the sun after substitute the respective values

V=42.1km/s

(b) from surface of a super giant it is nearly equal to velocity of light as neutrinos serves like a black holes.

(c) from surface of the white dwarf after substitute its respective values, V=5200km/s

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