- #1
sci0x
- 83
- 5
Question
A laser beam travels from air into a symmetrical prism at right angles close to its upper edge. The refractive index of the prism material n = 1.4 and its angle is 30 degrees.
i)
Calculate the critical angle for the prism-air interface.
Possible Answer:
Critical angle = arcsine(1/n)
arcsine(1/1.4)
= 45.585 degrees
ii)
After passing through the prism, what angle does the beam make with the incident ray?
Possible Answer:
Sine Angle = (n of prism)(Sine30)/n of air
= ((1.4)(Sin30))/1.0
Sine Angle = 0.7
Angle = 44.427 degrees
Are these correct?
A laser beam travels from air into a symmetrical prism at right angles close to its upper edge. The refractive index of the prism material n = 1.4 and its angle is 30 degrees.
i)
Calculate the critical angle for the prism-air interface.
Possible Answer:
Critical angle = arcsine(1/n)
arcsine(1/1.4)
= 45.585 degrees
ii)
After passing through the prism, what angle does the beam make with the incident ray?
Possible Answer:
Sine Angle = (n of prism)(Sine30)/n of air
= ((1.4)(Sin30))/1.0
Sine Angle = 0.7
Angle = 44.427 degrees
Are these correct?