Solve the Problem Using Snell's Law $$\frac { \sin \theta _ { 1 } } { \sin \theta _ { 2 } } = \frac { v _ { 1 } } { v _ { 2 } }$$

question 153

Multiple Choice

Solve the problem using Snell's Law: $$\frac { \sin \theta _ { 1 } } { \sin \theta _ { 2 } } = \frac { v _ { 1 } } { v _ { 2 } }$$
-A light beam in air travels at $2.99 \times 10 ^ { 8 }$ meters per second. If its angle of incidence to a second medium is $77 ^ { \circ }$ and its angle of refraction in the second medium is $67 ^ { \circ }$ , what is its speed in the second medium (to two decimal places) ?

• A) \(2.91 \times 10 ^ { 8 } \mathrm { mps }\)
• B) \(3.16 \times 10 ^ { 8 } \mathrm { mps }\)
• C) \(2.82 \times 10 ^ { 8 } \mathrm { mps }\)
• D) \(2.75 \times 10 ^ { 8 } \mathrm { mps }\)

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Definitions:

LIFO method

An inventory cost-flow assumption where the last items purchased or produced are the first to be expensed as sold, opposite of FIFO.

Cost of merchandise sold

The total expense incurred to produce or purchase the goods sold by a company during a specific period.

Year amount

Typically refers to the total sums of money or quantities measured over the course of a year in financial or quantitative analyses.

Average costing

Average costing is an inventory costing method where all costs of inventory are averaged over the goods available for sale, providing a medium cost per unit.