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

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

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

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: \(y_1=5 \sin 2 \pi(10{t}-0.1 {x}), {y}_2=10 \sin 2 \pi(10{t}-0.1 {x}).\) 
The ratio of intensities \(\dfrac{I_{max}}{I_{min}}\) will be:
1. \(1\)
2. \(9\)
3. \(4\)
4. \(16\)

If the ratio of amplitudes of two coherent sources producing an interference pattern is \(3:4\), the ratio of intensities at maxima and minima is:
1. \(3:4\)
2. \(9:16\)
3. \(49:1\)
4. \(25:7\)