Qstnid -C-2- The Frequency Range Of Visible Light Is From 3.75 × 10<sup>14</sup> Hz To 7.5 × 10<sup>14</sup> Hz. Calculate Its Wavelength Range. Take Speed Of Light = 3 × 10<sup>8</sup> M/s<sup>-1</sup> - 06: Spectrum Of Light - Icse-x-physics

Show Unit/Chapter Change Unit Change Subject Last Menu

ICSE-X-Physics

06: Spectrum of Light

with Solutions - page 3

Qstn# C-2 Prvs-Qstn Next-Qstn

#2
The frequency range of visible light is from 3.75
×
10¹⁴
Hz to 7.5
×
10¹⁴
Hz. Calculate its wavelength range. Take speed of light = 3
×
10⁸
m/s^-1
Ans : 2 Speed of light, c = 3
×10⁸m/s
Frequency range = 3.75
×10¹⁴ Hz to 7.5
× 10¹⁴ Hz.
Speed of light = frequency
× wavelength
For frequency = 3.75
× 10¹⁴Hz
Λ = c/v = (3
× 10⁸ m/s)/(3.75
×10¹⁴Hz) = 8 × 10^-7m = 8000 Å
For frequency = 7.5 × 10¹⁴ Hz
Λ = c/v = (3 × 10⁸ m/s)/(7.5
× 10¹⁴ Hz) = 4 × 10^-7m = 4000 Å
Wavelength range = 4000 Å to 8000 Å
Exercise 6 B