Assertion: A ray of light is incident from outside on a glass sphere surrounded by air. This ray may suffer total internal reflection at second interface.
Reason: If a ray of light goes from denser to rarer medium, it bends away from the normal.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Two point coherent sources of light S1 and S2 are placed on a line as shown. P and Q are two points on that line. If at point P maximum intensity is observed then maximum intensity should also be observed at Q.
Reason: In the figure of assertion the distance is equal to distance .
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
In a Fraunhofer diffraction at single slit of width d with incident light of wavelength 5500 Ao, the first minimum is observed, at angle 30°. The first secondary maximum is observed at an angle θ =
sin-1
sin-1
sin-1
sin-1
The intensity ratio of the maxima and minima in an interference pattern produced by two coherent sources of light is 9 : 1. The intensities of the used light sources are in ratio
3 : 1
4 : 1
9 : 1
10 : 1
The two coherent sources with intensity ratio β produce interference. The fringe visibility will be
2 β
Assertion: In YDSE bright and dark fringe are equally spaced.
Reason: It only depends upon phase difference.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
C.
If assertion is true but reason is false.
Fringe width is given by
β =
where, D= distance between slits and screen,
d = distance between coherent sources of light
and A = wavelength of incident light.
The assertion is true but reason is false. Young's Double-slit Experiment depends on distance between slits and screen (D), the wavelength of light used (λ), distance between the two slits (d).
In a certain double slit experimental arrangement, interference fringes of width 1 mm each are observed when light of wavelength 5000 Ao is used. Keeping the setup unaltered, if the source is replaced by another of wavelength 6000 Ao, the fringe width will be
1.2 mm
0.5 mm
1 mm
1.5 mm
Assertion: In a common emitter transistor amplifier, the input current is much less than the output current than output impedance.
Reason: The common emitter transistor amplifier has higher input impedance than output impedance.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: A secondary rainbow have inverted colours than the primary rainbow.
Reason: The secondary rainbow is formed by single total internal reflection.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Resolving power of reflecting microscope increase with
decrease in wavelength of incident light
increase in wavelength of incident light
increase in diameter of objective lens
none of these