Cosmic rays are highly energetic particles travelling through space. Howfast must a cosmic ray proton be travelling to have a de Brogliewavelength of 93 fm (femtometre)? Express you answer as a percentageof the speed of light, c.Note: Round your answer to the nearest 0.1 percent (for example,56.1%)Answer: Monochromatic light from a laser shines onto a gold surface andproduces photoelectrons with maximum kinetic energy KEmax = 3.5 eV.What is the wavelength of the laser light? Assume a work function of5.10 eV for gold.Please give your answer in units of nm, rounded to 1 decimal place.

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Cosmic rays are highly energetic particles travelling through space. How ast must a cosmic ray proton be travelling to have a de Broglie wavelength of 93 fm (femtometre)? Express you answer as a percentage of the speed of light, c. Note: Round your answer to the nearest 0.1 percent (for example, 56.1%)

Cosmic rays are highly energetic particles travelling through space. How ast must a cosmic ray proton be travelling to have a de Broglie wavelength of 93 fm (femtometre)? Express you answer as a percentage of the speed of light, c. Note: Round your answer to the nearest 0.1 percent (for example, 56.1%)

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter6: Photons And Matter Waves

Section: Chapter Questions

Problem 66P: The work function for potassium is 2.26 eV. What is the cutoff frequency when this metal is used as...

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