Physics Help! QUESTION 5 1 points Save Answer Will a beam of light that is at fi
ID: 1442186 • Letter: P
Question
Physics Help!
QUESTION 5 1 points Save Answer Will a beam of light that is at first in air and oriented perpendicular to the surface of a body of water be deflected as a result of the transition into water? It does not deflect, the light's direction will not change. It deflects ever so slightly to the left of the normal It deflects ever so slightly to the right of the normal. O It will not enter the water, all of the light will bounce back towards it the light source. QUESTION 6 2 points Save Answer Which of the following are needed in order for light to experience refraction. O A simple flat surface between the two mediums O You must go from a region with a lower index of refraction (n1) to a region with a higher index of refraction (n2). (n2 n1) O Different mediums n n2) O he incident angle (01) not equal to zero (01 OExplanation / Answer
5. By Snell’s law,
sini/sinr = nr/ni --------------(1)
Where i= angle of incidence,
r= angle of refraction
nr= refractive index in the second medium , water
ni= refractive index in the first medium , air
sinr = (ni/nr)*sini
since sini=sin0= 0 , refraction will not happen as a result ray will not deflect as it enters in the water.
6) From eqn (1) above,
To the refraction happen angle i (1 in this case) must be not be equal to 0.
Thus last option is true.