The refractive index of glass is $1.5$. What is the speed of light in glass? Speed of light in vacuum is $3.0 \times 10^{\mathrm{A}} \mathrm{ms}^{-1}$.

The refractive index of glass is $1.5$ . What is the speed of light in glass? Speed of light in vacuum is $3.0 \times 10^{\mathrm{A}} \mathrm{ms}^{-1}$ .

Physics | Previous year Chemistry Question Paper

The refractive index of glass is $1.5$ . What is the speed of light in glass? Speed of light in vacuum is $3.0 \times 10^{\mathrm{A}} \mathrm{ms}^{-1}$ .

Ans: Given refractive index of glass, $\mu=1.5$
Speed of light, $\mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$
Now, we have the speed of light in glass given by the relation,

$\mathrm{v}=\frac{\mathrm{c}}{\lambda}$

Substituting the given values,

$\begin{array}{l} \Rightarrow \mathrm{v}=\frac{3 \times 10^{8}}{1.5} \\ \therefore v=2 \times 10^{8} \mathrm{~m} / \mathrm{s} \end{array}$

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More Material

Consider interference between two sources of intensities I and 4I. What will be the intensity at points where phase differences are:

Write two points of difference between interference and diffraction.

State whether the following is true or false: The magnetic field inside a long circular coil carrying current will be parallel straight lines.

Derive an expression for electric potential at a point due to an electric dipole. Discuss the special cases.

Derive an expression for the potential at a point due to a short dipole. Hence show what will be the potential at an axial and an equatorial point :

Find out the wavelength at which a black body at temperature $700 \mathrm{~K}$ emits maximum energy

How does concave lens correct myopia?
A Increases the curvature of the eye lens
B Forms the image of the object at the retina
C Decreases the elongation of the eyeball
D All of the above Correct option is (B) Forms the image of the object at the retina

Above the curie temperature the susceptibility of ferromagnetic substance varies
1. inversely as the square root of absolute temperature
2. directly as the square root of absolute temperature
3. directly as the absolute temperature
4. inversely as the absolute temperature

For a transistor, αdc and βdc are the current ratios, then the value of $\frac{{{\beta }_{dc}}-{{\alpha }_{dc}}}{{{\alpha }_{dc}}.{{\beta }_{dc}}}$ is

Two identical light waves having phase difference ′ϕ′ propagate in same direction. When they superpose, the intensity of resultant wave is proportional to

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