A Light-Emitting Diode Emits One Microwatt of 640 Nm Photons

question 71

Multiple Choice

A light-emitting diode emits one microwatt of 640 nm photons. How many photons are emitted each second?

• A)2.5 × 10²⁰
• B)9.7 × 10²⁰
• C)2.0 × 10³¹
• D)3.0 × 10²¹
• E)3.2 × 10¹²

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Definitions:

Marginal Product

The additional output that is produced by adding one more unit of a specific input, ceteris paribus.

Average Product

The output produced per unit of input used; calculated by dividing the total product by the quantity of inputs.

Yards Raked

The total area of yards cleared of leaves or debris, serving as an indicator of performed maintenance or service activity.

Average Product

The output produced per unit of input, calculated by dividing total product by the quantity of input used in its production.