Gravitation

[SANZEED]

As far as I know,gravitational force reacts upon light. So is there any effect of this reaction if we are watching Venus or Neptune?

[Phlembac Adib Hasan]

As far as I know,gravitational force reacts upon light. So is there any effect of this reaction if we are watching Venus or Neptune?

অবশ্যই থাকবে। তবে আলোকে বাঁকানোর পক্ষে পৃথিবীর ভর খুবই অল্প।তাই বিচ্যুতি এত কম হবে যেটা সম্ভবত মাপাই অসম্ভব।

[SANZEED]

I don't think it's not only the earth's mass which will fact. There are other planets as well.

[Phlembac Adib Hasan]

তবে সূর্য কিন্তু কিছুটা বাঁকাতে পারে। এভাবে general theory of relativity-র একটা পরীক্ষামূলক প্রমাণ পাওয়া গিয়েছিল।(Source:একটুখানি বিজ্ঞান)

[Phlembac Adib Hasan]

I don't think it's not only the earth's mass which will fact. There are other planets as well.

Who said only earth's mass will effect?Other planets will also do so, at least theoretically.But as I said before, it's too small to measure.

[SANZEED]

তবে সূর্য কিন্তু কিছুটা বাঁকাতে পারে। এভাবে general theory of relativity-র একটা পরীক্ষামূলক প্রমাণ পাওয়া গিয়েছিল।(Source:একটুখানি বিজ্ঞান)

the measure was $1.72^{\circ}$,whereas theoretically it was $1.75^{\circ}$ .

[Phlembac Adib Hasan]

তবে সূর্য কিন্তু কিছুটা বাঁকাতে পারে। এভাবে general theory of relativity-র একটা পরীক্ষামূলক প্রমাণ পাওয়া গিয়েছিল।(Source:একটুখানি বিজ্ঞান)

the measure was $1.72^{\circ}$,whereas theoretically it was $1.75^{\circ}$ .

That's why it gave a practical proof of G.T.R.

[SANZEED]

Yes. I know about two other practical proofs: the perihilion passage of Mercury,and most probably another is related to Dopler effect.

[Phlembac Adib Hasan]

Yes, I know.But that proof was the first one.

[SANZEED]

I know that. Two groups of scientists measured the angle, one from Brazil, I think.the leader was Arther Eddington. But I read Einstein in his book. He gave them in this serial: 1st Mercury, then gravitation, then Dopler.