How to find optical instrument properties?

Ok so my main question is we got great telescopes and microscopes and binoculars.. How to calculate focal lengths and verify...

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How does 5x work on stars to buy binoculars question..

[9/11, 14:31] Dr. Harish Ravi: At the astrophysics club I would have seen high resolution telescopes.. but anyway I was unable to buy a...

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Observational astrophysics

[9/11, 07:57] Dr. Harish Ravi: In class X -x2 I used to observe with binoculars but didn't note observations seperated by 100 days.....

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Planets spring or ellipse how to closely observe?

[9/10, 22:34] Dr. Harish Ravi: There's planetary plane and mercury goes around in 100 days earth has seasons in 365 days and Jupiter 800...

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Stellar disappointment

[9/8, 12:56] Dr. Harish Ravi: Theta and rise and set times changes. So what can we predict and observe in Google sky time travel? For...

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To do really Great Science, Technology and Business

Harish in hexadecimal(0x..) is 48 61 72 69 78 68