Physics-
General
Easy
Question
A converging mirror , a point source S and a diverging mirror are arranged as shwon in figure. The source is placed at a distance of 30cm from . The focal length of each of the mirrors is 20cm. Consider only the images formed by a maximum of two reflections. It is found that one image is formed on the source itself. Find the distance between the two mirrors.
- 25cm
- 100cm
- 70cm
- 50cm
The correct answer is: 50cm
Related Questions to study
physics-
An object is placed in front of a concave mirror of focal length f as shown if figure. Choose the correct shape of the image :
An object is placed in front of a concave mirror of focal length f as shown if figure. Choose the correct shape of the image :
physics-General
physics-
In the figure shown if the object ' O' moves towards the plane mirror, then the image (which is formed after successive reflections fram respectively) will move:
In the figure shown if the object ' O' moves towards the plane mirror, then the image (which is formed after successive reflections fram respectively) will move:
physics-General
physics-
In the figure shown, the image of a real object is formed at point I. AB is the principal axis of the mirror. The mirror must be :
In the figure shown, the image of a real object is formed at point I. AB is the principal axis of the mirror. The mirror must be :
physics-General
physics-
A ray of light is incident on a concave mirror. It is parallel to the principal axis and its height from principal axis is equal to the focal length of the mirror. The ratio of the distance of point B to the distance of the focus from the centre of curvature is ( AB is the reflected ray)
A ray of light is incident on a concave mirror. It is parallel to the principal axis and its height from principal axis is equal to the focal length of the mirror. The ratio of the distance of point B to the distance of the focus from the centre of curvature is ( AB is the reflected ray)
physics-General
physics-
The circular boundary of the concave mirror subtends a cone of half angle at its centre of curvature. The minimum value of for which ray incident on this mirror parallel to the principle axis suffers reflection more than one is
The circular boundary of the concave mirror subtends a cone of half angle at its centre of curvature. The minimum value of for which ray incident on this mirror parallel to the principle axis suffers reflection more than one is
physics-General
physics-
A concave mirror of focal length 20cm is cut into two parts from the middle and the two parts are moved perpendicularly by a distance 1cm from the previous principle axis AB. The distance between the images formed by the two parts. If the dbject is kept at a distance of 10cm from the pole of the original principal axis is
A concave mirror of focal length 20cm is cut into two parts from the middle and the two parts are moved perpendicularly by a distance 1cm from the previous principle axis AB. The distance between the images formed by the two parts. If the dbject is kept at a distance of 10cm from the pole of the original principal axis is
physics-General
physics-
Two blocks each of mass lie on a smooth table. They are attached to two other masses as shown in the figure. The pulleys and strings are light. An object O is kept at rest on the table. The sides AB&CD of the two blocks are made reflecting. The acceleration of two images formed in those two reflecting surfaces w.r.t. each other is:
Two blocks each of mass lie on a smooth table. They are attached to two other masses as shown in the figure. The pulleys and strings are light. An object O is kept at rest on the table. The sides AB&CD of the two blocks are made reflecting. The acceleration of two images formed in those two reflecting surfaces w.r.t. each other is:
physics-General
physics-
A plane mirror M is arranged parallel to a wall W at a distace l from it. The light produced by a point source 'S' kept on the wall is reflected by the mirror and produces a light spot on the wall. The mirror moves with velocity towards the wall. Then
A plane mirror M is arranged parallel to a wall W at a distace l from it. The light produced by a point source 'S' kept on the wall is reflected by the mirror and produces a light spot on the wall. The mirror moves with velocity towards the wall. Then
physics-General
physics-
Find the velocity of image of a moving particle O' in the situation as shown in the figure.
Find the velocity of image of a moving particle O' in the situation as shown in the figure.
physics-General
physics-
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 . 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 . Then which of the following is true?
physics-General
physics-
Two plane mirrors of length L are separated by distance L and a man is standing at distance L from the connecting line of mirrors as shown in figure. A man is walking along a straight line at distance 2L parallel to the mirrors at speed u. Then the man at O will be able to see image of for total time of
Two plane mirrors of length L are separated by distance L and a man is standing at distance L from the connecting line of mirrors as shown in figure. A man is walking along a straight line at distance 2L parallel to the mirrors at speed u. Then the man at O will be able to see image of for total time of
physics-General
physics-
Two mirrors AB and CD are arranged along two parallel lines. The maximum number of images of object O that can be seen by any observer is
Two mirrors AB and CD are arranged along two parallel lines. The maximum number of images of object O that can be seen by any observer is
physics-General
physics-
A luminous point source ' s ' is placed between a plane mirror and a screen in the situation as shown in figure. Then the length of screen which will receive direct light as well as reflected lightis
A luminous point source ' s ' is placed between a plane mirror and a screen in the situation as shown in figure. Then the length of screen which will receive direct light as well as reflected lightis
physics-General
physics-
What are the co-ordinates of the image of S formed by a plane mirror as shown in figure?
What are the co-ordinates of the image of S formed by a plane mirror as shown in figure?
physics-General
physics-
Sun rays are reflected from a horizontal mirror and fall on a vertical screen. A vertical object of height h is placed on the mirror as shown in the figure. Length of the shadow on the screen is
Sun rays are reflected from a horizontal mirror and fall on a vertical screen. A vertical object of height h is placed on the mirror as shown in the figure. Length of the shadow on the screen is
physics-General