Q. No.The primary reason for a bucket filled with water to appear shallow is:
1. reflection
2. refraction
3. interference
4. diffraction
1. reflection
2. refraction
3. interference
4. diffraction
Subtopic: Refraction at Plane Surface |
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A transparent liquid fills a bucket to a depth of \(50\text{ cm}.\) When viewed from above, the bottom of the bucket appears to be \(5\text{ cm}\) higher than its actual position. The refractive index of the liquid is:
| 1. | \(\dfrac{4}{9}\) | 2. | \(\dfrac{7}{9}\) |
| 3. | \(\dfrac{10}{9}\) | 4. | \(\dfrac{11}{9}\) |
Subtopic: Refraction at Plane Surface |
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When the bottom of a container filled with a transparent liquid appears to be raised when viewed from above, what is the phenomenon responsible for this effect?
| 1. | refraction | 2. | interference |
| 3. | diffraction | 4. | reflection |
Subtopic: Refraction at Plane Surface |
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Two slabs of the same thickness of \(6~\text{cm}\) each are placed over one another as shown in the table.
The apparent depth of the table surface is \(N~\text{cm}.\) Then the value of \(N\) is: (\(N\) is the nearest integer)
1. \(6\)
2. \(7\)
3. \(9\)
4. \(3\)
The apparent depth of the table surface is \(N~\text{cm}.\) Then the value of \(N\) is: (\(N\) is the nearest integer)
1. \(6\)
2. \(7\)
3. \(9\)
4. \(3\)
Subtopic: Refraction at Plane Surface |
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A glass slab of refractive index \(1.47\) disappears in a trough of liquid. The refractive index of the liquid will be:
| 1. | \(\dfrac{1.47}{\sqrt {2}}\) | 2. | \(1.47\sqrt {2}\) |
| 3. | \(1.47\) | 4. | \(1.0\) |
Subtopic: Refraction at Plane Surface |
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A ray of light traveling in the air has a wavelength \(\lambda,\) frequency \(n,\) velocity \(v\) and intensity \(I.\) If this ray enters into water then these parameters are \(\lambda^{\prime}, n^{\prime}, v^{\prime}\) and \(I'\) respectively. Which relation is correct from the following?
1. \(\lambda=\lambda^{\prime}\)
2. \(n=n'\)
3. \(v=v'\)
4. \(I=I'\)
1. \(\lambda=\lambda^{\prime}\)
2. \(n=n'\)
3. \(v=v'\)
4. \(I=I'\)
Subtopic: Refraction at Plane Surface |
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What will happen when the light suffers refraction while it travels from a rarer to a denser medium?
| 1. | Its wavelength increases but its frequency remains constant. |
| 2. | Its wavelength decreases but the frequency remains constant. |
| 3. | Its wavelength remains constant but its frequency decreases. |
| 4. | Its wavelength and frequency both decrease. |
Subtopic: Refraction at Plane Surface |
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When a ray of light enters a glass slab from the air:
| 1. | its wavelength decreases. |
| 2. | its wavelength increases. |
| 3. | its frequency decreases. |
| 4. | neither its wavelength nor its frequency changes. |
Subtopic: Refraction at Plane Surface |
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The apparent depth of any volume of a liquid in a vessel is \(15~\text{cm}\). If the actual depth is \(20~\text{cm}\), then the refractive
index of liquid will be:
1. \(0.75\)
2. \(2.33\)
3. \(2\)
4. \(1.33\)
index of liquid will be:
1. \(0.75\)
2. \(2.33\)
3. \(2\)
4. \(1.33\)
Subtopic: Refraction at Plane Surface |
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If an object is placed under water \(\left ( \text{refractive index}=\frac{4}{3} \right )\) at a depth \(d\) below the surface, and viewed from above, it would appear to be at a depth:
1. \(d\)
2. \(\large\frac{d}{3}\)
3. \(\large\frac{3d}{4}\)
4. \(\large\frac{4d}{3}\)
1. \(d\)
2. \(\large\frac{d}{3}\)
3. \(\large\frac{3d}{4}\)
4. \(\large\frac{4d}{3}\)
Subtopic: Refraction at Plane Surface |
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