Apoint source of light is 80.0 cm below the surface of
a body of water. find the diameter of the circle at the surface
through which light emerges from the water.

The diameter of the circle at the surface is 1.814 m.

Explanation:

Given that,

Depth = 80 cm

Let the critical angle be c.

From Snell's law

The value of n for water,

Put the value of n in the equation (I)

We know that,

We calculate the radius of the circle

The diameter of the circle at the surface

Hence, The diameter of the circle at the surface is 1.814 m.

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

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