Multiple Choice
A light beam from a 2.1-mW He-Ne laser has a wavelength of 633 nm.How many photons does the laser emit in one second? (h = 6.626 × 10-34 J • s,c = 3.00 × 108 m/s)
A) 6.7 × 1015
B) 8.8 × 1015
C) 1.1 × 1016
D) 1.3 × 1016
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q1: A beam of X-rays at a certain
Q2: A metal having a work function of
Q3: A photon of initial wavelength 0.651 nm,after
Q4: A laser produces a beam of 4000-nm
Q5: An unstable particle produced in a high-energy
Q7: An 84-kW AM radio station broadcasts at
Q8: A laser emits light of wavelength 463
Q9: A beam of red light and a
Q10: A measurement of an electron's speed is
Q11: Monochromatic light strikes a metal surface and