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An object is placed at a distance of 25 cm from the pole of a convex mirror and a plane mirror is set at a distance 5 cm from the convex mirror so that the virtual images formed by the two mirrors do not have any parallax. The focal length of the convex mirror is :
15
Nov
An object is placed at a distance of 25 cm from the pole of a convex mirror and a plane mirror is set at a distance 5 cm from the convex mirror so that the virtual images formed by the two mirrors do not have any parallax. The focal length of the convex mirror is [...]
A plane glass mirror of thickness 3 cm of material of μ = 2/3 is silvered on the back surface. When a point object is placed 9 cm from the front surface of the mirror, then the position of the brightest image from the front surface is
15
Nov
A plane glass mirror of thickness 3 cm of material of μ = 2/3 is silvered on the back surface. When a point object is placed 9 cm from the front surface of the mirror, then the position of the brightest image from the front surface is A plane glass mirror of thickness 3 cm [...]
A concave mirror is placed on a horizontally table with its axis directed vertically upward. Let O be the pole of the mirror and C its centre of curvature. A point object is placed at C. It has a real image, also located at C. If the mirror is now filled with water, the image will be
15
Nov
A concave mirror is placed on a horizontally table with its axis directed vertically upward. Let O be the pole of the mirror and C its centre of curvature. A point object is placed at C. It has a real image, also located at C. If the mirror is now filled with water, the image [...]
A convex lens forms an image of an object placed 20cm away from it at a distance of 20cm on the other side of the lens. If the object moves 5cm towards the lens, then the image will be :
15
Nov
A convex lens forms an image of an object placed 20cm away from it at a distance of 20cm on the other side of the lens. If the object moves 5cm towards the lens, then the image will be : A convex lens forms an image of an object placed 20cm away from it at [...]
A convex lens A of focal length 20cm and a concave lens G of focal length 5cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d in cm will be
15
Nov
A convex lens A of focal length 20cm and a concave lens G of focal length 5cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d in cm will be The critical angle [...]
A convex lens of focal length 1.0m and a concave lens of focal length 0.25m are 0.75m apart. A parallel beam of light is incident on the convex lens. The beam emerging after refraction from both lenses is
15
Nov
A convex lens of focal length 1.0m and a concave lens of focal length 0.25m are 0.75m apart. A parallel beam of light is incident on the convex lens. The beam emerging after refraction from both lenses is The critical angle for light going from medium X into medium Y is θ. The speed of [...]
A convex lens of power +6d is placed in contact with concave lens of power -4d. what will be the nature and focal length of the combination ?
15
Nov
A convex lens of power +6d is placed in contact with concave lens of power -4d. what will be the nature and focal length of the combination ? A convex lens of power +6d is placed in contact with concave lens of power -4d. what will be the nature and focal length of the combination [...]
An object 15cm high is placed 10cm from the optical center of a thin lens. Its image is formed 25cm from the optical center on the same side of the lens as the object. The height of the image is:
15
Nov
An object 15cm high is placed 10cm from the optical center of a thin lens. Its image is formed 25cm from the optical center on the same side of the lens as the object. The height of the image is: An object 15cm high is placed 10cm from the optical center of a thin lens. [...]
Which of following is not a water absorber and dehydrating substance (a) Silica gel (b) P2O5 (c) Conc. H2SO4 (d) Aqueous CaCl2
15
Nov
Which of following is not a water absorber and dehydrating substance (a) Silica gel (b) P2O5 (c) Conc. H2SO4 (d) Aqueous CaCl2 Which of following is not a water absorber and dehydrating substance (a) Silica gel (b) P2O5 (c) Conc. H2SO4 (d) Aqueous CaCl2 November 15, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field (a) K (b) Rb (c) Li
15
Nov
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field (a) K (b) Rb (c) Li Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field (a) [...]