1)What is the minimum value of refractive index of a 60 degree angled prism for which there will be no emergent ray for an incident ray on the adjacent refracting surface?
2)The sun subtends an angle of 1/2 degree at the pole of a concave mirror of radiusof curvature= 1.5m. find the size of the image formed by the mirror,
2007-03-12 19:55:57 · 2 answers · asked by NS 1 in Science & Mathematics ➔ Mathematics
Two questions here involving different things, so I'll just do the first one.
Snell's Law is
n1 sin theta1 = n2 sin theta2
You have theta1 = 60 degrees, and for total internal reflection, theta2 must be 90 degrees, so
n sin 60 = 1.00 sin 90
n = 1/sin 60 = 1/ [(sqrt 3)/2] = 2/sqrt 3 = 1.1547 (answer)
2007-03-13 05:05:42 · answer #1 · answered by bpiguy 7 · 0⤊ 0⤋
Please place this in the physics section for a more proper response. Thank you.
2007-03-12 20:04:18 · answer #2 · answered by questionallthings 2 · 0⤊ 0⤋