Coherent Sources of Light and interference of Light Constructive, Distractive
WAVE OPTICS

283305 A mixture of light, consisting of wavelength 590 \(\mathrm{nm}\) and an unknown wavelength, illuminates Young's double slit and give rise to two overlapping interference patterns on the screen. The central maximum of both light coincides. Further it is observed that the third bright fringe of known light coincides with the fourth bright of the unknown light. From this data, the wavelength of the unknown light is

1 \(442.5 \mathrm{~nm}\)
2 \(398.4 \mathrm{~nm}\)
3 \(532.8 \mathrm{~nm}\)
4 \(672.3 \mathrm{~nm}\)
WAVE OPTICS

283306 In Young's double-silt experiment, two different light beams of wavelengths \(\lambda_1\) and \(\lambda_2\) produce interference pattern with band widths \(\beta_1\) and \(\beta_2\) respectively. If the ratio between \(\beta_1\) and \(\beta_2\) is \(3: 2\) then the ratio between \(\lambda_1\) and \(\lambda_2\) is

1 \(3: 1\)
2 \(1: 3\)
3 \(2: 3\)
4 \(3: 2\)
5 \(4: 5\)
WAVE OPTICS

283307 In a double slit experiment, when the distance between slits is increased 10 times, while their distance from the screen is halved, then the fringe width

1 Becomes \(\overline{\left(\frac{1}{20}\right)}\) times the original
2 Becomes \(\left(\frac{1}{90}\right)\) times the original
3 Remains the same
4 Becomes \(\left(\frac{1}{10}\right)\) times the original
WAVE OPTICS

283308 Calculate the fringe width obtained from a double slit apparatus immersed in a liquid of refractive index 1.33 given it has a slit separation of \(1 \mathrm{~mm}\) the distance between the plane of the slits and screen is \(1.33 \mathrm{~m}\) and the slits are illuminated by a parallel beam of light, whose wavelength in air is \(800 \mathrm{~mm}\).

1 \(0.8 \mathrm{~mm}\)
2 \(0.6 \mathrm{~mm}\)
3 \(0.4 \mathrm{~mm}\)
4 \(0.2 \mathrm{~mm}\)
WAVE OPTICS

283305 A mixture of light, consisting of wavelength 590 \(\mathrm{nm}\) and an unknown wavelength, illuminates Young's double slit and give rise to two overlapping interference patterns on the screen. The central maximum of both light coincides. Further it is observed that the third bright fringe of known light coincides with the fourth bright of the unknown light. From this data, the wavelength of the unknown light is

1 \(442.5 \mathrm{~nm}\)
2 \(398.4 \mathrm{~nm}\)
3 \(532.8 \mathrm{~nm}\)
4 \(672.3 \mathrm{~nm}\)
WAVE OPTICS

283306 In Young's double-silt experiment, two different light beams of wavelengths \(\lambda_1\) and \(\lambda_2\) produce interference pattern with band widths \(\beta_1\) and \(\beta_2\) respectively. If the ratio between \(\beta_1\) and \(\beta_2\) is \(3: 2\) then the ratio between \(\lambda_1\) and \(\lambda_2\) is

1 \(3: 1\)
2 \(1: 3\)
3 \(2: 3\)
4 \(3: 2\)
5 \(4: 5\)
WAVE OPTICS

283307 In a double slit experiment, when the distance between slits is increased 10 times, while their distance from the screen is halved, then the fringe width

1 Becomes \(\overline{\left(\frac{1}{20}\right)}\) times the original
2 Becomes \(\left(\frac{1}{90}\right)\) times the original
3 Remains the same
4 Becomes \(\left(\frac{1}{10}\right)\) times the original
WAVE OPTICS

283308 Calculate the fringe width obtained from a double slit apparatus immersed in a liquid of refractive index 1.33 given it has a slit separation of \(1 \mathrm{~mm}\) the distance between the plane of the slits and screen is \(1.33 \mathrm{~m}\) and the slits are illuminated by a parallel beam of light, whose wavelength in air is \(800 \mathrm{~mm}\).

1 \(0.8 \mathrm{~mm}\)
2 \(0.6 \mathrm{~mm}\)
3 \(0.4 \mathrm{~mm}\)
4 \(0.2 \mathrm{~mm}\)
WAVE OPTICS

283305 A mixture of light, consisting of wavelength 590 \(\mathrm{nm}\) and an unknown wavelength, illuminates Young's double slit and give rise to two overlapping interference patterns on the screen. The central maximum of both light coincides. Further it is observed that the third bright fringe of known light coincides with the fourth bright of the unknown light. From this data, the wavelength of the unknown light is

1 \(442.5 \mathrm{~nm}\)
2 \(398.4 \mathrm{~nm}\)
3 \(532.8 \mathrm{~nm}\)
4 \(672.3 \mathrm{~nm}\)
WAVE OPTICS

283306 In Young's double-silt experiment, two different light beams of wavelengths \(\lambda_1\) and \(\lambda_2\) produce interference pattern with band widths \(\beta_1\) and \(\beta_2\) respectively. If the ratio between \(\beta_1\) and \(\beta_2\) is \(3: 2\) then the ratio between \(\lambda_1\) and \(\lambda_2\) is

1 \(3: 1\)
2 \(1: 3\)
3 \(2: 3\)
4 \(3: 2\)
5 \(4: 5\)
WAVE OPTICS

283307 In a double slit experiment, when the distance between slits is increased 10 times, while their distance from the screen is halved, then the fringe width

1 Becomes \(\overline{\left(\frac{1}{20}\right)}\) times the original
2 Becomes \(\left(\frac{1}{90}\right)\) times the original
3 Remains the same
4 Becomes \(\left(\frac{1}{10}\right)\) times the original
WAVE OPTICS

283308 Calculate the fringe width obtained from a double slit apparatus immersed in a liquid of refractive index 1.33 given it has a slit separation of \(1 \mathrm{~mm}\) the distance between the plane of the slits and screen is \(1.33 \mathrm{~m}\) and the slits are illuminated by a parallel beam of light, whose wavelength in air is \(800 \mathrm{~mm}\).

1 \(0.8 \mathrm{~mm}\)
2 \(0.6 \mathrm{~mm}\)
3 \(0.4 \mathrm{~mm}\)
4 \(0.2 \mathrm{~mm}\)
WAVE OPTICS

283305 A mixture of light, consisting of wavelength 590 \(\mathrm{nm}\) and an unknown wavelength, illuminates Young's double slit and give rise to two overlapping interference patterns on the screen. The central maximum of both light coincides. Further it is observed that the third bright fringe of known light coincides with the fourth bright of the unknown light. From this data, the wavelength of the unknown light is

1 \(442.5 \mathrm{~nm}\)
2 \(398.4 \mathrm{~nm}\)
3 \(532.8 \mathrm{~nm}\)
4 \(672.3 \mathrm{~nm}\)
WAVE OPTICS

283306 In Young's double-silt experiment, two different light beams of wavelengths \(\lambda_1\) and \(\lambda_2\) produce interference pattern with band widths \(\beta_1\) and \(\beta_2\) respectively. If the ratio between \(\beta_1\) and \(\beta_2\) is \(3: 2\) then the ratio between \(\lambda_1\) and \(\lambda_2\) is

1 \(3: 1\)
2 \(1: 3\)
3 \(2: 3\)
4 \(3: 2\)
5 \(4: 5\)
WAVE OPTICS

283307 In a double slit experiment, when the distance between slits is increased 10 times, while their distance from the screen is halved, then the fringe width

1 Becomes \(\overline{\left(\frac{1}{20}\right)}\) times the original
2 Becomes \(\left(\frac{1}{90}\right)\) times the original
3 Remains the same
4 Becomes \(\left(\frac{1}{10}\right)\) times the original
WAVE OPTICS

283308 Calculate the fringe width obtained from a double slit apparatus immersed in a liquid of refractive index 1.33 given it has a slit separation of \(1 \mathrm{~mm}\) the distance between the plane of the slits and screen is \(1.33 \mathrm{~m}\) and the slits are illuminated by a parallel beam of light, whose wavelength in air is \(800 \mathrm{~mm}\).

1 \(0.8 \mathrm{~mm}\)
2 \(0.6 \mathrm{~mm}\)
3 \(0.4 \mathrm{~mm}\)
4 \(0.2 \mathrm{~mm}\)