Young’s Double Slit Experiment
PHXII10:WAVE OPTICS

368072 Assertion :
If the phase difference between the light waves emerging from the slits of the Young's experiment is \(\pi\) radian. The central fringe will be dark.
Reason :
Phase difference and path difference are not related.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII10:WAVE OPTICS

368073 In Young’s bouble slit experiment, fringes of width \(\beta \) are produced on a screen kept at a distance of 1 \(m\) from the slit. When the screen is moved away by \(5 \times {10^{ - 2}}{\rm{ }}m\) fringe width changes by \(3 \times {10^{ - 5}}{\rm{ }}m\). The separation between the slits is \(1 \times {10^{ - 3}}{\rm{ }}m\). The wavelength of the light used is____\(nm\).

1 500
2 600
3 700
4 400
PHXII10:WAVE OPTICS

368074 Monochromatic green light of wavelength \(5 \times {10^{ - 7}}\;m\) illuminates a pair of slits 1 \(mm\) apart. The separation of bright lines on the interference pattern formed on a screen \(2{\rm{ }}m\) away is

1 \(0.01\,mm\)
2 \(1.0\,mm\)
3 \(0.25\,mm\)
4 \(0.1\,mm\)
PHXII10:WAVE OPTICS

368075 Two coherent sources \(P\) and \(Q\) produce interference at point \(A\) on the screen where there is a dark band which is formed between \(4{\rm{th}}\) bright band and \(5{\rm{th}}\) bright band. Wavelength of light used is \(6000\mathop A\limits^o {\rm{ }}\) . The path difference between \(PA\) and \(QA\) is

1 \(1.4 \times {10^{ - 4}}{\rm{ }}cm\)
2 \(2.7 \times {10^{ - 4}}{\rm{ }}cm\)
3 \(4.5 \times {10^{ - 4}}{\rm{ }}cm\)
4 \(6.2 \times {10^{ - 4}}{\rm{ }}cm\)
PHXII10:WAVE OPTICS

368076 At two points \(P\) and \(Q\) on screen in Young’s double slit experiment, waves from slits \({S_1}\,{\rm{and}}\,{S_2}\) have a path difference of 0 and \(\frac{\lambda }{4},\) respectively. The ratio of intensities at \(P\) and \(Q\) will be:

1 \(\sqrt 2 :1\)
2 \(2:{\rm{ }}1\)
3 \(3{\rm{ }}:{\rm{ }}2\)
4 \(4{\rm{ }}:{\rm{ }}1\)
PHXII10:WAVE OPTICS

368072 Assertion :
If the phase difference between the light waves emerging from the slits of the Young's experiment is \(\pi\) radian. The central fringe will be dark.
Reason :
Phase difference and path difference are not related.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII10:WAVE OPTICS

368073 In Young’s bouble slit experiment, fringes of width \(\beta \) are produced on a screen kept at a distance of 1 \(m\) from the slit. When the screen is moved away by \(5 \times {10^{ - 2}}{\rm{ }}m\) fringe width changes by \(3 \times {10^{ - 5}}{\rm{ }}m\). The separation between the slits is \(1 \times {10^{ - 3}}{\rm{ }}m\). The wavelength of the light used is____\(nm\).

1 500
2 600
3 700
4 400
PHXII10:WAVE OPTICS

368074 Monochromatic green light of wavelength \(5 \times {10^{ - 7}}\;m\) illuminates a pair of slits 1 \(mm\) apart. The separation of bright lines on the interference pattern formed on a screen \(2{\rm{ }}m\) away is

1 \(0.01\,mm\)
2 \(1.0\,mm\)
3 \(0.25\,mm\)
4 \(0.1\,mm\)
PHXII10:WAVE OPTICS

368075 Two coherent sources \(P\) and \(Q\) produce interference at point \(A\) on the screen where there is a dark band which is formed between \(4{\rm{th}}\) bright band and \(5{\rm{th}}\) bright band. Wavelength of light used is \(6000\mathop A\limits^o {\rm{ }}\) . The path difference between \(PA\) and \(QA\) is

1 \(1.4 \times {10^{ - 4}}{\rm{ }}cm\)
2 \(2.7 \times {10^{ - 4}}{\rm{ }}cm\)
3 \(4.5 \times {10^{ - 4}}{\rm{ }}cm\)
4 \(6.2 \times {10^{ - 4}}{\rm{ }}cm\)
PHXII10:WAVE OPTICS

368076 At two points \(P\) and \(Q\) on screen in Young’s double slit experiment, waves from slits \({S_1}\,{\rm{and}}\,{S_2}\) have a path difference of 0 and \(\frac{\lambda }{4},\) respectively. The ratio of intensities at \(P\) and \(Q\) will be:

1 \(\sqrt 2 :1\)
2 \(2:{\rm{ }}1\)
3 \(3{\rm{ }}:{\rm{ }}2\)
4 \(4{\rm{ }}:{\rm{ }}1\)
PHXII10:WAVE OPTICS

368072 Assertion :
If the phase difference between the light waves emerging from the slits of the Young's experiment is \(\pi\) radian. The central fringe will be dark.
Reason :
Phase difference and path difference are not related.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII10:WAVE OPTICS

368073 In Young’s bouble slit experiment, fringes of width \(\beta \) are produced on a screen kept at a distance of 1 \(m\) from the slit. When the screen is moved away by \(5 \times {10^{ - 2}}{\rm{ }}m\) fringe width changes by \(3 \times {10^{ - 5}}{\rm{ }}m\). The separation between the slits is \(1 \times {10^{ - 3}}{\rm{ }}m\). The wavelength of the light used is____\(nm\).

1 500
2 600
3 700
4 400
PHXII10:WAVE OPTICS

368074 Monochromatic green light of wavelength \(5 \times {10^{ - 7}}\;m\) illuminates a pair of slits 1 \(mm\) apart. The separation of bright lines on the interference pattern formed on a screen \(2{\rm{ }}m\) away is

1 \(0.01\,mm\)
2 \(1.0\,mm\)
3 \(0.25\,mm\)
4 \(0.1\,mm\)
PHXII10:WAVE OPTICS

368075 Two coherent sources \(P\) and \(Q\) produce interference at point \(A\) on the screen where there is a dark band which is formed between \(4{\rm{th}}\) bright band and \(5{\rm{th}}\) bright band. Wavelength of light used is \(6000\mathop A\limits^o {\rm{ }}\) . The path difference between \(PA\) and \(QA\) is

1 \(1.4 \times {10^{ - 4}}{\rm{ }}cm\)
2 \(2.7 \times {10^{ - 4}}{\rm{ }}cm\)
3 \(4.5 \times {10^{ - 4}}{\rm{ }}cm\)
4 \(6.2 \times {10^{ - 4}}{\rm{ }}cm\)
PHXII10:WAVE OPTICS

368076 At two points \(P\) and \(Q\) on screen in Young’s double slit experiment, waves from slits \({S_1}\,{\rm{and}}\,{S_2}\) have a path difference of 0 and \(\frac{\lambda }{4},\) respectively. The ratio of intensities at \(P\) and \(Q\) will be:

1 \(\sqrt 2 :1\)
2 \(2:{\rm{ }}1\)
3 \(3{\rm{ }}:{\rm{ }}2\)
4 \(4{\rm{ }}:{\rm{ }}1\)
PHXII10:WAVE OPTICS

368072 Assertion :
If the phase difference between the light waves emerging from the slits of the Young's experiment is \(\pi\) radian. The central fringe will be dark.
Reason :
Phase difference and path difference are not related.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII10:WAVE OPTICS

368073 In Young’s bouble slit experiment, fringes of width \(\beta \) are produced on a screen kept at a distance of 1 \(m\) from the slit. When the screen is moved away by \(5 \times {10^{ - 2}}{\rm{ }}m\) fringe width changes by \(3 \times {10^{ - 5}}{\rm{ }}m\). The separation between the slits is \(1 \times {10^{ - 3}}{\rm{ }}m\). The wavelength of the light used is____\(nm\).

1 500
2 600
3 700
4 400
PHXII10:WAVE OPTICS

368074 Monochromatic green light of wavelength \(5 \times {10^{ - 7}}\;m\) illuminates a pair of slits 1 \(mm\) apart. The separation of bright lines on the interference pattern formed on a screen \(2{\rm{ }}m\) away is

1 \(0.01\,mm\)
2 \(1.0\,mm\)
3 \(0.25\,mm\)
4 \(0.1\,mm\)
PHXII10:WAVE OPTICS

368075 Two coherent sources \(P\) and \(Q\) produce interference at point \(A\) on the screen where there is a dark band which is formed between \(4{\rm{th}}\) bright band and \(5{\rm{th}}\) bright band. Wavelength of light used is \(6000\mathop A\limits^o {\rm{ }}\) . The path difference between \(PA\) and \(QA\) is

1 \(1.4 \times {10^{ - 4}}{\rm{ }}cm\)
2 \(2.7 \times {10^{ - 4}}{\rm{ }}cm\)
3 \(4.5 \times {10^{ - 4}}{\rm{ }}cm\)
4 \(6.2 \times {10^{ - 4}}{\rm{ }}cm\)
PHXII10:WAVE OPTICS

368076 At two points \(P\) and \(Q\) on screen in Young’s double slit experiment, waves from slits \({S_1}\,{\rm{and}}\,{S_2}\) have a path difference of 0 and \(\frac{\lambda }{4},\) respectively. The ratio of intensities at \(P\) and \(Q\) will be:

1 \(\sqrt 2 :1\)
2 \(2:{\rm{ }}1\)
3 \(3{\rm{ }}:{\rm{ }}2\)
4 \(4{\rm{ }}:{\rm{ }}1\)
PHXII10:WAVE OPTICS

368072 Assertion :
If the phase difference between the light waves emerging from the slits of the Young's experiment is \(\pi\) radian. The central fringe will be dark.
Reason :
Phase difference and path difference are not related.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII10:WAVE OPTICS

368073 In Young’s bouble slit experiment, fringes of width \(\beta \) are produced on a screen kept at a distance of 1 \(m\) from the slit. When the screen is moved away by \(5 \times {10^{ - 2}}{\rm{ }}m\) fringe width changes by \(3 \times {10^{ - 5}}{\rm{ }}m\). The separation between the slits is \(1 \times {10^{ - 3}}{\rm{ }}m\). The wavelength of the light used is____\(nm\).

1 500
2 600
3 700
4 400
PHXII10:WAVE OPTICS

368074 Monochromatic green light of wavelength \(5 \times {10^{ - 7}}\;m\) illuminates a pair of slits 1 \(mm\) apart. The separation of bright lines on the interference pattern formed on a screen \(2{\rm{ }}m\) away is

1 \(0.01\,mm\)
2 \(1.0\,mm\)
3 \(0.25\,mm\)
4 \(0.1\,mm\)
PHXII10:WAVE OPTICS

368075 Two coherent sources \(P\) and \(Q\) produce interference at point \(A\) on the screen where there is a dark band which is formed between \(4{\rm{th}}\) bright band and \(5{\rm{th}}\) bright band. Wavelength of light used is \(6000\mathop A\limits^o {\rm{ }}\) . The path difference between \(PA\) and \(QA\) is

1 \(1.4 \times {10^{ - 4}}{\rm{ }}cm\)
2 \(2.7 \times {10^{ - 4}}{\rm{ }}cm\)
3 \(4.5 \times {10^{ - 4}}{\rm{ }}cm\)
4 \(6.2 \times {10^{ - 4}}{\rm{ }}cm\)
PHXII10:WAVE OPTICS

368076 At two points \(P\) and \(Q\) on screen in Young’s double slit experiment, waves from slits \({S_1}\,{\rm{and}}\,{S_2}\) have a path difference of 0 and \(\frac{\lambda }{4},\) respectively. The ratio of intensities at \(P\) and \(Q\) will be:

1 \(\sqrt 2 :1\)
2 \(2:{\rm{ }}1\)
3 \(3{\rm{ }}:{\rm{ }}2\)
4 \(4{\rm{ }}:{\rm{ }}1\)