logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
0 votes

Wavelength of a colour of light for air is $6000\;A^{\circ}$ and in water the wavelength is $4500\;A^{\circ}$. What is the speed of light in water.

$(a)\;5.0 \times 10^{14}m/s \\ (b)\;2.25 \times 10^8 m/s \\ (c)\;4.0 \times 10^8 m/s \\ (d)\;1.5 \times 10^{14} $

Can you answer this question?
 
 

1 Answer

0 votes
Velocity $\times $ wavelength = constant
$\large\frac{v_1}{v_2} =\frac{\lambda _1}{\lambda_2}$
$\large\frac{v_2}{3 \times 10^8 }=\frac{4500}{6000}$
$\qquad= 2.25 \times 10^8 m/s$
Hence b is the correct answer.

 

answered Jan 16, 2014 by meena.p
edited Jul 14, 2014 by thagee.vedartham
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...