Light passes from a material with index of refraction 1.25 to one with index of refraction 1.72. the angle of incidence is 34.3°. what is the angle of refraction?

angle of refraction is 24.17°

Explanation:

given data

index of refraction n1 =  1.25

index of refraction n2 = 1.72

angle of incidence θ1 =  34.3°

to find out

angle of refraction (θ2)

solution

we will apply here snells law that is

n1 sinθ1 = n2 sinθ2    1

here put all these value and find θ2

1.25 sin34.3 = 1.72 sinθ2  

sinθ2  = 0.70440 /1.72

sinθ2 = 0.4095

θ2 = 24.17°

so here angle of refraction is 24.17°

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.