Saturday

April 19, 2014

April 19, 2014

Posted by **crystal** on Sunday, September 11, 2011 at 7:47pm.

r = 12.0 feet wide. Attached to the ceiling is a piece of glass (with unknown index of refraction) which is 2.5 feet thick. A laser pointer in the bottom left corner is aimed so that the ray which reflects off the glass hits the room's bottom right corner.

(a) What is the ray's angle of incidence at the glass?

°

(b) If the ray which refracts into the glass hits the ceiling 7.7 feet away from the left wall, what is the refracted ray's angle of refraction at the glass?

°

(c) What is the glass's index of refraction?

- physics -
**bobpursley**, Sunday, September 11, 2011 at 7:54pmDraw the figure, use geometry to calculate the angles.

**Related Questions**

physics - The figure below shows a room which is h = 8.5 feet tall and r = 14.5 ...

math - Alan built an additional room onto his house. the length of the room is 3...

algebra - I need help figuring this out. If an object 3.9 feet tall casts a ...

physics - a room which is h = 9.0 feet tall and r = 12.0 feet wide. Attached to ...

college physics - I know you need to use geometry but i don't know how a room ...

Math - A flagpole is 20 feet tall and, in the afternoon, casts a shadow of 30 ...

math - A carpenter is adding a sun room to the back of a house. If the width of ...

math - Erika is painting her living room. The room measures 10.5 feet by 11.5 ...

math - I have a flagpole 30 feet tall amirror 10 feet from pole and someone ...

Mathsw - A man 6 feet tall is standing 9 feet from a 18 feet tall light pole. ...