Consider sunlight incident on a slit of width \(10^{4}~\mathring{A}.\) The image seen through the slit shall:
1. be a fine sharp slit white in colour at the centre
2. a bright slit white at the centre diffusing to zero intensities at the edges
3. a bright slit white at the centre diffusing to regions of different colours
4. only be a diffused slit white in colour
Subtopic:  Diffraction |
From NCERT
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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)

Subtopic:  Diffraction |
From NCERT
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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
Choose the correct option:
1. (a), (b) 2. (a), (c)
3. (b), (d) 4. (c), (d)
Subtopic:  Diffraction |
 56%
From NCERT
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