Question
Q220) The value of Planck's constant is 6.63 × 10–34 Js. The speed of light is 3 × 1017 nm s–1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 × 1015 s–1? [NEET-2013]
Q220) The value of Planck's constant is 6.63 × 10–34 Js. The speed of light is 3 × 1017 nm s–1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 × 1015 s–1? [NEET-2013]
SOLUTION
Use formula λ = C/ν here ν if frequency
As velocity oflightis given in nm/s and wave length asked is also in nm no need to convert in m
Answer:(b)