= ________ degrees 1.Assume all angles to be exact. Two people stand 5.6 m apart
ID: 2009788 • Letter: #
Question
= ________ degrees 1.Assume all angles to be exact. Two people stand 5.6 m apart and 2.5 m away from a large plane mirror in a dark room. At what angle of incidence should one of them shine a flashlight on the mirror so that the reflected beam directly strikes the other person? Express your answer using two significant figures. Phi = degrees 2. The index of refraction is inversely proportional to the wavelength of light in the medium. is inversely proportional to the speed of light in a medium. is always greater than or equal to 1. all of the preceding.Explanation / Answer
if v is the velocity of light in medium
c is the velocity of light in free space then
the refractive index is n=c/v ............... (1)
so the refractive index is inversly preportional speed of light in medium
as we know that velocity and wave length are directly preportional to each other
the refractive index is inversly p;reportional to wavelength of light in medium
As we know that velocity of light in a medium never exceed the velocity of light in air
from equatiomn 1 it is clear that refravtive index isalways greater than 1
if the medium is air then it is equals to 1
so ALL THE THREE OPTIONS ARE CORRECT
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