- #1
jnimagine
- 178
- 0
We are learning about refraction of light at school
and we did an experiment with a semi circle plexi glass
We shone a ray of light at the plexiglass at different angles to find out the different angles of refraction.
When we had the semicircle plexiglass upside down, meaning curved part pointing downwards, and shone a light through the centre to the straight side of the glass, our refracted rays went toward the normal. When the ratio sine of incident rays and sine of refracted rays were done, we found out that the numbers were constant( all 1.5) and i think this showed the index of refraction of the second medium. am i right?
and then we put the semicircle right side up, meaning curved part facing up, and shone a light throught the centre to the curved edges, the refracted rays moved away from the normal. When the ratio of sine of incident rays and sine of refracted rays were taken, the numbers were constant with 0.67. Does this just represent n2 / n1? so index of air / index of glass? (1.00029/1.5)??
and also at 42 degrees, the refracted rays were at 90 degrees and after that all the bigger angles of incident rays got reflected.
So my question is what is the significance of the number 0.67 and what is its relation to the first part of the experiment where i got the number 1.5?
... i have to answer these two questions in two sentences...- -;;
and we did an experiment with a semi circle plexi glass
We shone a ray of light at the plexiglass at different angles to find out the different angles of refraction.
When we had the semicircle plexiglass upside down, meaning curved part pointing downwards, and shone a light through the centre to the straight side of the glass, our refracted rays went toward the normal. When the ratio sine of incident rays and sine of refracted rays were done, we found out that the numbers were constant( all 1.5) and i think this showed the index of refraction of the second medium. am i right?
and then we put the semicircle right side up, meaning curved part facing up, and shone a light throught the centre to the curved edges, the refracted rays moved away from the normal. When the ratio of sine of incident rays and sine of refracted rays were taken, the numbers were constant with 0.67. Does this just represent n2 / n1? so index of air / index of glass? (1.00029/1.5)??
and also at 42 degrees, the refracted rays were at 90 degrees and after that all the bigger angles of incident rays got reflected.
So my question is what is the significance of the number 0.67 and what is its relation to the first part of the experiment where i got the number 1.5?
... i have to answer these two questions in two sentences...- -;;