Light from a Laser Forms a 1 $1.58 \times 10 ^ { 4 } \mathrm {~W} / \mathrm { m } ^ { 2 }$

question 94

Multiple Choice

Light from a laser forms a 1.31-mm diameter spot on a wall. If the light intensity in the spot is $1.58 \times 10 ^ { 4 } \mathrm {~W} / \mathrm { m } ^ { 2 }$ what is the power output of the laser? Assume that all the light emitted by the Iaser hits the spot.

• A) 21.3 mW
• B) 17.9 mW
• C) 13.2 mW
• D) 24.7 mW

---

Definitions:

CCA Class

Capital Cost Allowance (CCA) Class refers to categories used in taxation to determine the depreciation rate that can be claimed for tax purposes on assets, depending on their nature and use in a business.

Break-Even Lease Payment

The payment amount at which the lessee neither profits nor loses money over the term of the lease.

Corporate Tax Rate

The percentage of a corporation's profits that is paid to the government as tax.

CCA Class

In Canadian taxation, a way to categorize depreciable properties for the purpose of Capital Cost Allowance calculations.