CBSE Class 10 Light - Reflection and Refraction — practice questions
82 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 10 Light - Reflection and Refraction in the app →According to the law of reflection, the angle of incidence is equal to the:A concave mirror is also known as a:A convex mirror is also known as a:The image formed by a plane mirror is:The bending of light as it passes from one transparent medium into another is called:A convex lens is a:A concave lens is a:The distance between the pole and the principal focus of a spherical mirror is called the:For a spherical mirror, the focal length f and radius of curvature R are related by:The type of mirror used as a rear-view (wing) mirror in vehicles is a:A concave mirror is used by dentists and for shaving because it can form a:The refractive index of a medium compares the speed of light in:Light is assumed, in this chapter, to travel in:Which property is true of an image formed by a plane mirror?The principal focus of a spherical mirror, for small apertures, lies:A spherical mirror has a radius of curvature of 24 cm. Its focal length is:A concave mirror forms a tiny, real, inverted image at its focus when the object is placed:An image formed by a convex mirror is always:Why are convex mirrors preferred as rear-view (wing) mirrors in vehicles?In the New Cartesian Sign Convention for spherical mirrors, distances measured along the principal axis are POThe mirror formula relating object distance u, image distance v, and focal length f is:A concave mirror forms a virtual, erect image. The magnification m must be:Light bends when it passes from one transparent medium to another. This phenomenon is called:The refractive index of a medium is 1.5. The speed of light in this medium is:A ray of light passes from air into water (refractive index 1.33). The ray will bend:Which of the following can make a parallel beam of light when light from a point source is incident on it?Under which of the following conditions a concave mirror can form an image larger than the actual object?A full length image of a distant tall building can definitely be seen by usingIn torches, search lights and headlights of vehicles the bulb is placedAccording to the laws of reflection, the angle of reflection equals:The image formed by a plane mirror is:A spherical mirror whose reflecting surface curves inwards (towards the centre of the sphere) is called:For a spherical mirror of small aperture, the relation between radius of curvature R and focal length f is:A concave mirror has a radius of curvature of 20 cm. Its focal length is:A concave mirror is used as a shaving mirror because, when the face is held within its focal length, it producWhich mirror is used as a rear-view mirror in vehicles?An object is placed at the centre of curvature C of a concave mirror. Its image is:The New Cartesian Sign Convention takes distances measured against the direction of incident light as:In the mirror formula 1/v + 1/u = 1/f, what does u represent?An object is placed 30 cm in front of a concave mirror of focal length 10 cm. The image distance is:Magnification m for a spherical mirror is given by:A 4 cm tall object placed at 20 cm gives an image at -40 cm (concave mirror). The image is:When light passes from a rarer medium to a denser medium, it bends:The absolute refractive index of a medium is the ratio of:The refractive index of water is 1.33. The speed of light in water (in m/s) is approximately:A ray of light travels from air into a glass slab. Which of the following changes is correct?In a glass slab, a ray of light is refracted twice. The emergent ray is:A convex lens forms a real image when the object is placed:Power of a lens is measured in:A lens has focal length 50 cm. Its power is:A concave lens has a focal length of -25 cm. Its power is:Two thin lenses of power +3 D and -1 D are kept in contact. The net power is:A concave mirror with focal length 20 cm forms an image at 30 cm in front of it. The object is at:For a concave mirror, magnification is +3 (virtual, erect, enlarged). If image is at +60 cm, object is at:Which property of the image makes a convex mirror preferred for rear-view?Lateral inversion in a plane mirror means:Refractive index of medium A with respect to medium B is given by:Light travelling from air strikes a water surface at 0° to the normal. The angle of refraction is:A pencil partially dipped in water appears bent at the surface. This is due to:A convex lens of focal length 20 cm produces a real image at distance 60 cm. The object is at:A real image formed by a convex lens is:The principal focus of a concave lens is:A lens forms an image of an object placed at twice its focal length. The image is:When you look at your face in a steel spoon's inner curved surface, the image is:Why does a concave mirror used as a torch reflector produce a parallel beam?The focal length of a plane mirror is:A diverging lens is also called:Laws of reflection state that the angle of incidence equals the angle of reflection, AND:The image formed by a plane mirror is:The principal focus of a concave mirror is the point where:For a spherical mirror, the relation between focal length f and radius of curvature R is:The mirror formula is:Magnification produced by a spherical mirror is:When light passes from a less dense medium (air) into a denser medium (glass), it:The refractive index of a transparent medium is defined as:Snell's law of refraction is:Power of a lens of focal length f (in metres) is given by:A convex lens of focal length 25 cm has power equal to:The lens formula for a thin lens is:Total internal reflection occurs when light travels from:An object placed at the focus of a concave mirror produces an image:A convex lens of focal length 20 cm has an object placed at 30 cm from it. The image distance is: