CBSE Class 10 Answered
If light is a electromagnetic wave and light has very less mass and gravitational force is directly proportional to mass of the body and therefore this neglible mass of the sun's electromagnetic wave (light) allows them to escape the gravity of the sun and travel towards the earth .Then why this theory is not applicable or hold true for dark holes we know due dark holes's strong gravitational force light can't escape but you told gravitational pull is directly proportional to mass and light has neglible mass so it should also escape dark holes? please explain this.
Asked by abinash.gupta003 | 24 Sep, 2017, 08:02: PM
Expert Answer
- The previous solution was given with respect to the transmission of sunlight towards the Earth.
- It explained how the electromagnetic waves of the sunlight are those massless rays of light that escape suns gravity which is tremendoulsy more than the Earth's gravity.
- But now refering to the black hole, a black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space.
- Black holes can be big or small.
- These black holes are very tiny but have the mass of a large mountain.
- There is one more kind of black hole that is called "stellar."
- Its mass can be up to 20 times more than the mass of the sun.
- And therefore, it is possible that the massless electromagnetic waves escapes Sun's gravity and reach the Earth, but it is impossibl for it or any other element to escape the black hole.
Answered by Abhijeet Mishra | 25 Sep, 2017, 07:52: PM
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