You have a beaker with a layer of olive oil floating on top of water. A ray of light travels through the oil and is incident on the water with an angle of 73.4°. Using the index of refraction of the oil as 1.470 and the index of refraction of water as 1.333, determine the critical angle in oil for the oil-water interface.

Explanation:

The critical angle in oil for the oil-water interface refers to the angle for which the light ray is totally reflected.

Angle of incidence = 73.4°

Angle of refraction = 1.470°

Index of refraction = 1.333

Here, refers to the critical angle.

is an index of refraction

is angle of refraction

Here, angle of incidence is more than the critical angle,

light undergoes total internal reflection.

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50