Question

Can someone pls explain this to me

Answer 1

Answer:

Explanation:

from snells law

sin(i)/sin(r) = refractive index

r = 90°

sin(i) = sin90°x 1.6

sin(i) = 1 x 1.6

angle of incidence = arcsin(1.6)

since sin90° = 1

hence,

angle of incidence = 36.86°

Answer 2

Answer: The angle of incidence is 38.68°

Explanation:

By snell law we have that:

n1*sen(a1) = n2*sen(a2)

where n1 and n2 are the coefficient of refraction, a1 and a2 are the incident and refracted angles.

where in this case, because we are calculating the refraction from the plane surface inside the block, we have that n1 = 1.6m a2 = 90° and n2 = 1, where we suppose that outside the block we have air.

then we have:

1.6*sin(a1) = 1*sen(90) = 1

sin(a1) = 1/1.6

asin(sin(a1)) = a1 = asin(1/1.6) = 38.68°