光學 CH01

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光學CH01練習題

Problem 1

Calculate the de Broglie wavelength of (a) a golf ball of mass 50g moving at 20m/s and (b) an electron with kinetic energy of 10eV. (02小題)

(a)\(\lambda\)=___m
可嘗試次數(no. of submission)= 3

01

(b)\(\lambda\)=___m
可嘗試次數(no. of submission)= 3

02

Problem 2

The threshold of sensitivity of the human eye is about 100 photons per second. The eye is most sensitive at a wavelength of around 550nm. For this wavelength, determine the threshold in watts of power. (01小題)

P=___W
可嘗試次數(no. of submission)= 3

03

Problem 3

What is the energy, in electron volts, of light photons at the ends of the visible spectrum that is at wavelengths of 380 and 770nm? (02小題)

\(E_{380nm}\)=___eV
可嘗試次數(no. of submission)= 3

04

\(E_{770nm}\)=___eV
可嘗試次數(no. of submission)= 3

05

Problem 4

Determine the wavelength and momentum of a photon whose energy equals the rest-mass energy of an electron. (02小題)

wavelength=___m
可嘗試次數(no. of submission)= 3

06

momentum =___kg*m/s
可嘗試次數(no. of submission)= 3

07

Problem 5

Show that the rest-mass energy of an electron is 0.511MeV. (01小題)

E=_____MeV
可嘗試次數(no. of submission)= 3

08

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