A Light-Emitting Diode Has a Power Output of 0

question 33

Multiple Choice

A light-emitting diode has a power output of 0.3 W. If 590 nm is the average wavelength of the source, about how many photons are emitted per second? (h = 6.63 *10^-34 J.s, c = 3.00 *10⁸ m/s, and 1 nm = 10^-9 m)

• A) 10²¹
• B) 10²⁵
• C) 10¹⁸
• D) 10²⁹

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Definitions:

Muscle Strength

The ability of a muscle or group of muscles to exert force against resistance, important for physical health and performance.

Spot Reduction

A fitness myth that suggests it's possible to target fat loss in specific areas of the body through focused exercises.

Body Composition

The percentages of fat, bone, water, and muscle in the human body, which can influence health and physical performance.

Aerobic Exercises

Exercises that require an increased amount of oxygen consumption over an extended period of time.