Explain what is optical path length . How is it different from actual path length ?

Explain work as a path function.

What is path length or Range of S.H.M ?

What is free mean path ?

What is law of length ?

Define and describe magnifying power of an optical instrument. How does it differ from Linear Magnification.

What is path function?

In a young's double slit experiment, the difference in optical path length between the rays starting from the slits S_1 and S_2 and reaching a point A, on the screen in 0.0075mm and reaching another point B on the screen, on the other side of the central fringes is 0.0015 mm. How many bright and dark fringes are observed between A and B if the wavelength of light used is 6000 A^@

What is the length of each nephron?