Chapter 26 – Geometrical Optics
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 26 - Geometrical Optics
A clear transparent glass sphere (μ = 1.5) of radius R is immersed in a liquid of refractive index 1.25. A parallel beam of light incident on it will converge to a point. The distance of this point from the centre will be
15
Nov
A clear transparent glass sphere (μ = 1.5) of radius R is immersed in a liquid of refractive index 1.25. A parallel beam of light incident on it will converge to a point. The distance of this point from the centre will be A convex mirror of radius of curvature 1.6 m has an object [...]
The image of an object placed on the principal axis of a concave mirror of focal length 12 cm is formed at a point which is 10cm more distance form the mirror than the object. The magnification of the image is
15
Nov
The image of an object placed on the principal axis of a concave mirror of focal length 12 cm is formed at a point which is 10cm more distance form the mirror than the object. The magnification of the image is A convex mirror of radius of curvature 1.6 m has an object placed at [...]
A piece of wire bent into an L shape with upright and horizontal portion of equal lengths is placed with the horizontal portion along the axis of the concave mirror towards pole of mirror whose radius of curvature is 10 cm. If the bend is 20 cm from the pole of the mirror, then the ratio of the lengths of the images of the upright and horizontal portion of the wire is
15
Nov
A piece of wire bent into an L shape with upright and horizontal portion of equal lengths is placed with the horizontal portion along the axis of the concave mirror towards pole of mirror whose radius of curvature is 10 cm. If the bend is 20 cm from the pole of the mirror, then the [...]
A convex mirror and a concave mirror of radius 10cm each are placed 15cm apart facing each other. An object is placed midway between them. If the reflection first takes place in the concave mirror and then in convex mirror, the position of the final image is
15
Nov
A convex mirror and a concave mirror of radius 10cm each are placed 15cm apart facing each other. An object is placed midway between them. If the reflection first takes place in the concave mirror and then in convex mirror, the position of the final image is A convex mirror of radius of curvature 1.6 [...]
A convex mirror of radius of curvature 1.6 m has an object placed at a distance of 1 m from it. The image is formed at a distance of
15
Nov
A convex mirror of radius of curvature 1.6 m has an object placed at a distance of 1 m from it. The image is formed at a distance of A convex mirror of radius of curvature 1.6 m has an object placed at a distance of 1 m from it. The image is formed at [...]
When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9 cm^−1 , the speed with which the image moves is
15
Nov
When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9 cm^−1 , the speed with which the image moves is the image is formed at a distance of 10 cm. [...]
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 [...]