A Monochromatic Light Source Illuminates a Double Slit and the Resulting

question 1

Multiple Choice

A monochromatic light source illuminates a double slit and the resulting interference pattern is observed on a distant screen. Let d be the center-to-center slit spacing, a the individual slit width, D the screen-to-slit distance, and ℓ the adjacent dark line spacing in the interference pattern. The wavelength of the light is then:

---

Definitions:

Annual Cash Inflow

The total amount of money received from operations, investments, and financing activities within a year.

Net Present Value

A financial metric that calculates the difference between the present value of cash inflows and the present value of cash outflows over a period of time.

Project Profitability Index

A financial metric that compares the present value of a project's expected cash flows to its initial investment, used to evaluate the relative profitability of investments.

Discount Rate

The rate of interest applied in DCF evaluations to estimate the current worth of future cash inflows.