An Electron Microscope Operates with Electrons of Kinetic Energy 100

question 11

Multiple Choice

An electron microscope operates with electrons of kinetic energy 100 keV.What is the wavelength of these electrons? Assume this speed is not relativistic.(h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10−¹⁹ J,and m_e = 9.11 × 10−³¹ kg)

• A) 5.49 × 10−¹² m
• B) 7.14 × 10−¹¹ m
• C) 9.28 × 10−¹⁰ m
• D) 3.88 × 10−¹² m

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Definitions:

Marginal Revenue

The additional income earned by selling one more unit of a good or service; it can vary depending on the current level of output and market conditions.

Fourth Unit

Typically implies an incremental or additional unit in a sequence, often used in economics or logistics to discuss marginal utilities or effects.

Price Discrimination

The practice of charging different prices to different customers for the same product or service, based on factors like willingness to pay, location, or purchase volume.

Resell

The act of selling an item that one has previously purchased or acquired, potentially at a different price point.