Light with a Frequency of 8

question 86

Multiple Choice

Light with a frequency of 8.70 × 10¹⁴ Hz is incident on a metal that has a work function of 2.80 eV.What is the maximum kinetic energy that a photoelectron ejected in this process can have? (1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J ∙ s)

• A)8.7 × 10^-19 J
• B)3.1 × 10^-19 J
• C)1.3 × 10^-19 J
• D)2.4 × 10^-19 J
• E)4.5 × 10^-19 J

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Definitions:

CPAP Device

A medical device that uses continuous positive airway pressure to keep airways open in people who have breathing problems, such as sleep apnea.

Sleep Apnea

A disorder affecting sleep, marked by breaks in breathing or shallow breaths while asleep.

Physician

A medical professional who diagnoses and treats illnesses and injuries, providing care and guidance on health maintenance.

Continuous Positive Airway Pressure

A therapeutic device used in treating sleep apnea that provides a constant stream of air to keep the airway open during sleep.