Jemmy

A 550-nm light is incident on a double slit interference arrangements and fringes are viewed on screen. A thin flake of mica (n = 1.58) is used to cover one of slits. As a result the central point on the viewing screen is now at the location of seventh br...

Well I think it's D, if you read that link that Reed posted I would think D because they didn't start really writing these records until after the Civil War. But I don't know though lol.

I agree with Anna that it's A, in the lesson you're studying we learned about how all subjects are intertwined with art. Hope this helps!

please help me to solve the questiion below