Huygens' wave theory allows us to know the:

When the light diverges from a point source, the shape of the wavefront is:

1. Parabolic.

2. Plane.

3. Spherical.

4. Elliptical.

By Huygen's wave theory of light, we cannot explain the phenomenon of:

Huygen's principle for secondary wavelets may be used to:

Which of the following is not true?

Light travels faster in the air than in glass. This is in accordance with:

The plane wavefront is incident on a spherical mirror as shown. The reflected wavefront will be:

 

1.		2.
3.		4.

Two superposing waves are represented by the following equations: 
\({\mathrm{y}_1=5 \sin 2 \pi(10 \mathrm{t}-0.1 \mathrm{x}), \mathrm{y}_2=10 \sin 2 \pi(10 \mathrm{t}-0.1 \mathrm{x}).}\)
Ratio of intensities $\frac{{\mathrm{I}}_{\max }}{{\mathrm{I}}_{\min }}$ will be:

1. 1
2. 9
3. 4
​​​​​​​4. 16