(b) Focal length of a convex mirror is + ve. (a) Focal length of a concave mirror is -ve, and What sign (+ve or-ve) is given to the focal length of: What should be the position of the object when a concave mirror is to be used: If an object is placed at the focus of a concave mirror, where is the image formed? Why is convex mirror used as a rearview mirror in vehicles? State any one reason.Īs convex mirror gives a wider field view of the approaching traffic it is used as a rearview mirror in vehicles. Which mirror-convex or concave has a larger field of view? Name the type of mirror which always forms a virtual and diminished image. Write two different uses of concave mirrors. What kind of image can be obtained on the screen? What is the angle of reflection when a ray of light falls normally on a plane mirror? Optical fibres, which transmit many telephonic messages at the same time. Name a communication device which uses light for its working. The principal axis of a spherical mirror is the line joining the pole and the centre of curvature of a spherical mirror. The path along which light travels is called a ray of light.Ī group of light rays originating from a source and travelling in some definite direction is known as a beam of light.ĭefine the term principal axis of a spherical mirror. Light is a form of energy which gives us the sensation of sight or vision. Class 10 Science Chapter 10 Extra Questions and Answers Light Reflection and RefractionĮxtra Questions for Class 10 Science Chapter 10 Light Reflection and Refraction with Answers Solutions Light Reflection and Refraction Extra Questions Very Short Answer Type
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