6. 0/2 points | Previous Answers GioCP2 28.P.033 My Notes An electron has the same energy as a photon of red light 632 nm) (a) What is the momentum of the electron? .04E-27Xkg m/s (b) What is the ratio of the momentum of the electron to the momentum of the photon? Pphoton Need Help? Read lt Talk to a Tutor
Solution
Wavelength of violet light ? = 632 nm
= 632 x 10 -9 m
Energy of the photon E = hc / ?
Where h = Planck\'s constant
= 6.625 x 10 -34 Js
c = 3 x 10 8 m / s
Subsitute the values we get E = 3.1447 x 10 -19 J
Energy of electron = E
P 2 / 2m = E
From this Momentum of electron P = ?[2mE ]
Where m = mass of electron
= 9.11 x 10 -31 kg
Subsittue the values we get P = 7.57 x 10 -25 kg m / s
(b). Momentum of photon p = h / ?
= 1.0479 x 10 -27 kg m / s
the ratio of the momentum of the electron to the momentum of the photon is
P / p = 722.4
.
6- 0-2 points - Previous Answers GioCP2 28-P-033 My Notes An electron.docx
1. 6. 0/2 points | Previous Answers GioCP2 28.P.033 My Notes An electron has the same energy as
a photon of red light 632 nm) (a) What is the momentum of the electron? .04E-27Xkg m/s (b)
What is the ratio of the momentum of the electron to the momentum of the photon? Pphoton
Need Help? Read lt Talk to a Tutor
Solution
Wavelength of violet light ? = 632 nm
= 632 x 10 -9
m
Energy of the photon E = hc / ?
Where h = Planck's constant
= 6.625 x 10 -34
Js
c = 3 x 10 8
m / s
Subsitute the values we get E = 3.1447 x 10 -19
J
Energy of electron = E
P 2
/ 2m = E
From this Momentum of electron P = ?[2mE ]
Where m = mass of electron
= 9.11 x 10 -31
kg
Subsittue the values we get P = 7.57 x 10 -25
kg m / s
(b). Momentum of photon p = h / ?
= 1.0479 x 10 -27
kg m / s
2. the ratio of the momentum of the electron to the momentum of the photon is
P / p = 722.4
![6. 0/2 points | Previous Answers GioCP2 28.P.033 My Notes An electron has the same energy as
a photon of red light 632 nm) (a) What is the momentum of the electron? .04E-27Xkg m/s (b)
What is the ratio of the momentum of the electron to the momentum of the photon? Pphoton
Need Help? Read lt Talk to a Tutor
Solution
Wavelength of violet light ? = 632 nm
= 632 x 10 -9
m
Energy of the photon E = hc / ?
Where h = Planck's constant
= 6.625 x 10 -34
Js
c = 3 x 10 8
m / s
Subsitute the values we get E = 3.1447 x 10 -19
J
Energy of electron = E
P 2
/ 2m = E
From this Momentum of electron P = ?[2mE ]
Where m = mass of electron
= 9.11 x 10 -31
kg
Subsittue the values we get P = 7.57 x 10 -25
kg m / s
(b). Momentum of photon p = h / ?
= 1.0479 x 10 -27
kg m / s](https://image.slidesharecdn.com/6-0-2points-previousanswersgiocp228-p-033mynotesanelectron-230201022421-1ac771d4/85/6-0-2-points-Previous-Answers-GioCP2-28-P-033-My-Notes-An-electron-docx-1-320.jpg)
