Can someone help me answer this question please? and thank you! Your trusty 1 mW

Question

Can someone help me answer this question please? and thank you!

Your trusty 1 mW He-Ne laser beam has a wavelength l = 632.8 nm. Perform the following calculations, or answer the following questions about your prized possession: 1) calculate the energy, E, of the He-Ne laser beam in electron volts (eV); 2) what color does this laser beam’s wavelength correspond?; 3) If this laser beam is focused into a 1 carat diamond, with index of refraction n = 2.42, calculate the speed of the He-Ne laser beam, as you check the quality of your purchase at Zale’s Diamonds, with your best girl. (20 points)

a. E = 1.96 eV; Color is in the visible range, and is red; v = 1.24 x 108 m/sec.

b. E = 1.6 x 10-19 eV; color is not in the visible range; v = 3 x 108 m/sec.

c. E = 2.5 eV; Color is in the visible range, and is green; v = 1.24 x 108 m/sec.

d. E = 3.03 eV; Color is in the visible range, and is violet; v = 4 x 108 m/sec.

Explanation / Answer

1) E = hc/lamda

E(eV) = 1243/lamda(nm)

E = 1243/632.8

E = 1.96 eV

2) lamda = 632.8 nm belongs to red color

3)n = 2.42

n = c/v

2.42= 3*10^8/v

v = 1.24*10^8 m/s

correct option is (A)

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.