Q. Wavelength of light of frequency $100Hz$
A) $2 \times 10^{6}m$
B) $3 \times 10^{6}m$
C) $4 \times 10^{6}m$
D) $5 \times 10^{6}m$
Explanation
(b) $\lambda = \frac{c}{v} = \frac{3 \times 10^{8}}{100} = 3 \times 10^{6}m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.