Physics-
General
Easy

Question

Consider the following diagram The incident ray parallel to the optical axis passing through

  1. left foci    
  2. right focus    
  3. optical centre    
  4. (b) & (c)    

The correct answer is: right focus

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A layered lens as shown in the figure is made of two materials indicated by different shades. A point object is placed on its axis. The lens will form.

A layered lens as shown in the figure is made of two materials indicated by different shades. A point object is placed on its axis. The lens will form.

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A prism of refractive index open parentheses fraction numerator 3 over denominator 2 end fraction close parentheses is immersed in water of refractive index open parentheses fraction numerator 4 over denominator 3 end fraction close parentheses. For the total internal reflection the correct choice is

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A vessel contains a slab of glass 8cm thick and of refractive index 1.6 over the slab, the vessel is filled by oil of refractive index m upto height 4.5 cm and also by another liquid i.e., water of refractive index fraction numerator 4 over denominator 3 end fraction and height 6cm as shown in figure. An observer looking down from above, observes that, a mark at the bottom of the glass slab appears to be raised up to position 6cm from the bottom of the slab. The refractive index of the oil is

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In the Figure, AB and BK represent incident and reflected rays. If angle BCF = 35º. Then angle B F P. will be equal to ____ degrees

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Assertion : The net deviation suffered by a light ray incident on a plane mirror as shown in the figure is 360 degree minus 2 cross times 30 degree equals 300 degree
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A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
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Assertion : The net deviation suffered by a light ray incident on a plane mirror as shown in the figure is 360 degree minus 2 cross times 30 degree equals 300 degree
Reason : A ray of light is incident on a plane mirror at an angle i with the normal to the mirror. It strikes another plane mirror inclined at an angle theta with the first mirror. It is given that i less than theta. The net deviation produced after reflection once from each mirror is2 pi minus 2 theta.
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B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
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Assertion : In YDSE number of bridge figure or dark fringe can not be unlimited
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B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
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Assertion : In YDSE number of bridge figure or dark fringe can not be unlimited
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B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.

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B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
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In an interference arrangement, similar to Young's double slit experiment, the slits S l 1 and S subscript 2 end subscript are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are syn necrotized to have zero phase difference. The slits are separated by distance d equals 150 m. The intensity l subscript open parentheses theta close parentheses end subscript is measured as a function of theta comma where theta is defined as shown in figure. If l subscript 0 end subscript is maximum intensity, then l subscript open parentheses theta close parentheses end subscript for 0 less or equal than theta less or equal than 90 is given by

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A glass prism of refractive index 1.5 is immersed in water open parentheses mu equals 4 divided by 3 close parentheses. Light beam incident normally on the face AB is totally reflected to reach the face BC if

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Two identical sources P and Q emit waves in same phases and of same wavelength. Spacing between P and Q is 3 lambda. The maximum distance from P along the x-axis at which a minimum intensity occurs is given by

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