The number of photons emitted in 10 hour by a 40 W sodium lamp (N = 5890 Å) is 0 6.41 X 1024 0 4.26 x 1021 O 4.26 x 1024 6.4 x 1020

The number of photons emitted in 10 hour by a 40 W sodium lamp (N = 58

1.	The number of photons emitted in 10 hour by a 40 W sodium lamp (N = 5890 Å) is 0 6.41 X 1024 0 4.26 x 1021 O 4.26 x 1024 6.4 x 1020
Answer» Correct option isA6.5×10 24 E=P×t=60×10×60×60=216×10 4 Jλ=6000 A˚ =6000×10 −10 mE= λnhc N= hcEλ = 6.626×10 −34 ×3×10 8 216×10 4 ×6000×10 −10 =6.5×10 24 photons.