Q. No.Light travels faster in the air than in glass. This is in accordance with:
| 1. | the wave theory of light. |
| 2. | the corpuscular theory of light. |
| 3. | neither \((1)\) nor \((2)\) |
| 4. | both \((1)\) and \((2)\) |
Soap bubble appears coloured due to the phenomenon of:
1. Interference
2. Diffraction
3. Dispersion
4. Reflection
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:
| 1. | Interference |
| 2. | Diffraction |
| 3. | Photoelectric effect |
| 4. | Polarisation |
Huygens' wave theory allows us to know the:
| 1. | wavelength of the wave. |
| 2. | velocity of the wave. |
| 3. | amplitude of the wave. |
| 4. | propagation of the wavefront. |
Huygen's principle for secondary wavelets may be used to:
| 1. | explain Snell's law. |
| 2. | find the velocity of light in vacuum. |
| 3. | find a new position of a wavefront. |
| 4. | both (1) & (3) are correct. |
| 1. | \(\dfrac{9}{4}\) | 2. | \(\dfrac{121}{49}\) |
| 3. | \(\dfrac{49}{121}\) | 4. | \(\dfrac{4}{9}\) |
If an interference pattern has maximum and minimum intensities in a \(36:1\) ratio, then what will be
the ratio of their amplitudes?
1. \(5:7\)
2. \(7:4\)
3. \(4:7\)
4. \(7:5\)
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. \(16\)
1. \(7\)
2. \(5\)
3. \(\sqrt{7}\)
4. \(6.5\)
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