Recent content by nubey1

I was not introduced to the law of refraction. I did look ahead in my physics book catch a glimpse of what it is about. This is my attempt at just hucking the formulas. \vartheta=arcsin(n2/n1)=arcsin(1.25/1.33)=1.222 \vartheta*\lambda=1.222*700=855.5nm Is this correct?

Homework Statement A very thin oil film(n=1.25) floats on water(n=1.33). What is the thinnest film that produces a strong reflection for visible light with a wavelength of 700nm? Homework Equations \lambda=(2nd)/(m-0.5) d=(m-0.5)*(\lambda/2n) thinnest film has m=1 The Attempt at a...

Homework Statement A loudspeaker at the origin emits sound waves on a day when the speed of sound is 340 m/s. A crest of the wave simultaneously passes listeners at the coordinates (38m,0m) and (0m,29m). What are the lowest two possible frequencies of the sound? Homework Equations...

Homework Statement The length of a string attached to a pendulum is measured with a precision of (+or-)0.2. The time of the oscillation is measured to a precision of (+or-)0.1. How many periods must you measure so that the contribution of the uncertainty in time is smaller than the...