- 1(current)
Q. No.Given below are two statements:
| Assertion (A): | To observe the diffraction of light the size of the obstacle/aperture should be of the order of 10-7 m. |
| Reason (R): | 10-7 m is the order of the wavelength of visible light. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Consider sunlight incident on a pinhole of width \(10^{3}~\mathring{{A}}\). The image of the pinhole seen on a screen shall be:
| (a) | a sharp white ring |
| (b) | different from a geometrical image |
| (c) | a diffused central spot, white in colour |
| (d) | diffused coloured region around a sharp central white spot |
Choose the correct option:
1. (a), (c)
2. (a), (d)
3. (b), (d)
4. (b), (c)
Consider the diffraction pattern for a small pinhole. As the size of the hole is increased:
| (a) | the size decreases | (b) | the intensity increases |
| (c) | the size increases | (d) | the intensity decreases |
| 1. | (a), (b) | 2. | (a), (c) |
| 3. | (b), (d) | 4. | (c), (d) |
Assertion: The colour of the green flower seen through red glass appears to be dark.
Reason: Red glass transmits only red light.
1. Both the assertion and the reason are true and the reason is a correct explanation of the assertion.
2. Both the assertion and reason are true but the reason is not a correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Both the assertion and reason are false.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: At the first glance, the top surface of the Morpho butterfly's wing appears a beautiful blue-green. If the wind moves the colour changes.
Reason: Different pigments in the wing reflect light at different angles.
1. Both the assertion and the reason are true and the reason is a correct explanation of the assertion.
2. Both the assertion and reason are true but the reason is not a correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Both the assertion and reason are false.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: Crystalline solids can cause X-rays to diffract.
Reason: Interatomic distance in crystalline solids is of the order of 0.1 nm.
1. Both the assertion and the reason are true and the reason is a correct explanation of the assertion.
2. Both the assertion and reason are true but the reason is not a correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Both the assertion and reason are false.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: The clouds in the sky generally appear to be whitish.
Reason: Diffraction due to clouds is efficient in equal measure at all wavelengths.
1. Both the assertion and the reason are true and the reason is a correct explanation of the assertion.
2. Both the assertion and reason are true but the reason is not a correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Both the assertion and reason are false.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
- 1(current)
Q. No.
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