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Question
Two plane mirrors of length L are separated by distance L and a man M2 is standing at distance L from the connecting line of mirrors as shown in figure. A man M1 is walking is a straight line at distance 2 L parallel to mirrors at speed u, then man M2 at O will be able to see image of M1 for total time:
The correct answer is:
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As shown in the figure a particle is placed at O in front of a plane mirror M. A man at P can move along path PY and PY' then which of the following is true
As shown in the figure a particle is placed at O in front of a plane mirror M. A man at P can move along path PY and PY' then which of the following is true
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A point source of light S is placed in front of two large mirrors as shown. Which of the following observers will see only one image of S?
A point source of light S is placed in front of two large mirrors as shown. Which of the following observers will see only one image of S?
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Two mirrors, labeled LM for left mirror and RM for right mirror in the adjacent figure, are parallel to each other and 3.0 m apart. A person standing 1.0 m from the right mirror (RM) looks into this mirror and sees a series of images. How far from the person is the second closest image seen in the right mirror (RM)?
Two mirrors, labeled LM for left mirror and RM for right mirror in the adjacent figure, are parallel to each other and 3.0 m apart. A person standing 1.0 m from the right mirror (RM) looks into this mirror and sees a series of images. How far from the person is the second closest image seen in the right mirror (RM)?
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A boy of height 1.5 m with his eye level at 1.4 m stands before a plane mirror of length 0.75 m fixed on the wall. The height of the lower edge of the mirror above the floor is 0.8 m. Then :
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Two plane mirror AB and AC are inclined at an angle 
= 20°. A ray of light starting from point P is incident at point Q on the mirror AB, then at R on mirror AC and again on S on AB finally the ray ST goes parallel to mirror Ac. The angle which the ray makes with the normal at point Q on mirror AB is
Two plane mirror AB and AC are inclined at an angle = 20°. A ray of light starting from point P is incident at point Q on the mirror AB, then at R on mirror AC and again on S on AB finally the ray ST goes parallel to mirror Ac. The angle which the ray makes with the normal at point Q on mirror AB is
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A point source of light 'S' at a distance d from the screen A produces light intensity 
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A point source of light 'S' at a distance d from the screen A produces light intensity at the centre of the screen. If a completely reflecting mirror M is placed at a distance d behind the source as shown in the figure, treating object and its image as incoherent with each other, find the intensity at the centre of the screen
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Two mirrors are inclined at an angle as shown in the figure. Light ray is incident parallel to one of the mirrors. The way will start retracting its path after third reflection if:
Two mirrors are inclined at an angle as shown in the figure. Light ray is incident parallel to one of the mirrors. The way will start retracting its path after third reflection if:
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A steady flow of water passes along a horizontal tube from a wide section X to the narrower section Y, see figure. Manometers are placed at P and Q at the sections. Which of the statements A, B, C, D, E is most correct?
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A cylindrical vessel is filled with a liquid up to height H. A small hole is made in the vessel at a distance y below the liquid surface as shown in figure. The liquid emerging from the hole strike the ground at distance x
A cylindrical vessel is filled with a liquid up to height H. A small hole is made in the vessel at a distance y below the liquid surface as shown in figure. The liquid emerging from the hole strike the ground at distance x
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Figure shows a siphon. Choose the wrong statement:
Figure shows a siphon. Choose the wrong statement:
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The vessel shown in the figure has two sections. The lower part is a rectangular vessel with area of cross-section A and height h. The upper part is a conical vessel of height h with base area ‘A’ and top area ‘a’ and the walls of the vessel are inclined at an angle 30° with the vertical. A liquid of density r fills both the sections upto a height 2h. Neglecting atmospheric pressure
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A soap bubble has radius R and thickness d (<< R) as shown. It colapses into a spherical drop. The ratio of excess pressure in the drop to the excess pressure inside the bubble is
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A liquid is filled in a spherical container of radius R till a height h. At this positions the liquid surface at the edges is also horizontal. The contact angle is
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The displacement of a ball falling from rest in a viscous medium is platted against time. Choose a possible option
The displacement of a ball falling from rest in a viscous medium is platted against time. Choose a possible option
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A body of mass 0.2kg is freely falling from a height 20m. Find its momentum before touching the ground. (g = 10m/s2)
A body of mass 0.2kg is freely falling from a height 20m. Find its momentum before touching the ground. (g = 10m/s2)
physics-General
