Posted by **william** on Tuesday, September 13, 2011 at 10:18am.

I know you need to use geometry but i don't know how

a room which is h = 9.0 feet tall and 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.

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?

## Answer This Question

## Related Questions

- physics - The figure below shows a room which is h = 8.5 feet tall and r = 14.5 ...
- physics - a room which is h = 9.0 feet tall and r = 12.0 feet wide. Attached to...
- physics - a room which is h = 9.0 feet tall and r = 12.0 feet wide. Attached to ...
- Geometry - A gallon of paint costs $20 and covers 465 square feet. Three coats ...
- Geometry - the walls, floor, and ceiling of a room form a rectangular solid. The...
- geometry - a room is 18 feet long,15 feet wide and has an 8 foot ceiling.a cord ...
- Math -word problem - There is a room 10 feet high by 10 feet wide by 10 feet in ...
- MATH WORD PROBLEMS - PART A Camilla has a rectangular print that is 34 inches ...
- math - A school is soundproofing a band room with insulating tiles. The room is ...
- College algebra - An architect wishes to design a large room 122 feet long that ...

More Related Questions