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Optics biconvex and plano convex - Physics Stack Exchange or, 1 feq = 1 f1 + 1 f2 − d nf1f2 1 f e q = 1 f 1 + 1 f 2 d n f 1 f 2 (for thick lens) Here, P' is the power of the biconvex lens initially and P1 and P2 are the powers of the two plano convex lens Then, according to the question, the planoconvex lens are arranged so that the curved surface of one touches the plane surface of the other
How is focal length defined for a two-lens system, separated by a . . . The distance for the lens or lens set to converge an incoming parallel beam to a single point For a diverging lens or set extend the diverging rays backwards until they converge on the optic axis The distance from this point to the first deflection from parallel is the focal length, usually expressed as -ve for a divergence
The electric field formula $E=F q$ - Physics Stack Exchange This is a great example of how causal understanding of physics is not manifestly obvious if you naively look at the mathematical expression What you say is true but is correctly formulated in the following way: for a given force F F on a charge q q, the electric field E E (at the location of the charge) would have to get bigger as the charge q q gets smaller In other words, what it says is
When do we use the formula - Physics Stack Exchange The formula E = kQ r2 E = k Q r 2 is the electric field of a point charge in radial direction at a distance r r from the charge This means, especially, that the field is not homogeneous, i e not the same at every point in space Compare this to your "the magnitude of the electric field is" and you'll find that we are either missing information or the point charge is not the right way to go
Distance of electromagnetic waves based on frequency Based on the relation between frequency and wavelengths, the higher the frequency, the shorter the wavelengths and therefore the distance of travel is lower Assuming two frequencies from the ISM b
When does F (electrical)=qE=F (magnetic)=qvB hold? Under what circumstances can I set the force due to an electrical field, F = qE F = q E equal to the force due to a magnetic field F = qVB F = q V B?
What happens when you cut a biconvex lens in half? It might help to think about the symmetry of a sliced biconvex lens If the biconvex lens can focus light from point F1 to F2, both distance f f from the lens, then when you cut the lens in half, each half will have a focal length equal to f f The focal length of the biconvex lens is f 2 f 2 The general lensmaker's equation, from Wikipedia, is