Optics Question 718
Question: When a light wave goes from air into water, the quality that remains unchanged is its
[ RPET 1996, 2000, 03; RPMT 1999, 2000; DCE 2001; BHU 2001]
Options:
A) Speed
B) Amplitude
C) Frequency
D) Wavelength
Show Answer
Answer:
Correct Answer: C
Solution:
Let $ {\nu }’ $ and $ {\lambda }’ $ represents frequency and wavelength of light in medium respectively. so $ {\nu }’=\frac{v}{{{\lambda }’}}=\frac{c/\mu }{\lambda /\mu }=\frac{c}{\lambda }=\nu $
