What is the nature of the image formed by a concave mirror if the magnification produced by the mirror is + 3?īetween which two points of a concave mirror should an object be placed to obtain a magnification of -3?ĭraw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it. The angle of reflection should also be 0°. That is the ray passing through the centre of curvature is incident normally to the mirror. This is because the angle of incidence is 0°. ∠LON = ∠MOL = 25° Įxplain why a ray of light passing through the centre of curvature of a concave mirror gets reflected along the same path after reflection. ∠LON = ∠FOC = 25° (vetically oppsite angles) What is the value of 0 in the following ray diagram? So, a convex mirror has a virtual principal focus, which is situated behind the mirror. In a convex mirror, a parallel beam after reflection do not actually pass through the focus (F) but it appears to come from the back side of the mirror from focus. Why does a convex mirror is said to have a virtual principal focus? what is the total angle through which the ray of light turns?.The angle between an incident ray and the mirror is 40°. The virtual image formed by a concave mirror is always magnified whereas the virtual image formed by a convex mirror is diminished. What type of mirrors are used in these three parts?ĭifferentiate between virtual image formed by a concave mirror and of a convex mirror. Yes, a plane mirror can be called a spherical mirror Normal of infinite radius of curvature.Ī man standing in front of a spherical mirror, finds his image having a very small head, a fat body and legs of normal size. +ve sign of magnification shows that the image is virtual and erect.Ĭan a plane mirror be called spherical mirror? What is the significance of +ve sign of magnification? (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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In this page, you can find CBSE Class 10 Science Chapter 10 Extra Questions and Answers Light Reflection and Refraction Pdf free download, NCERT Extra Questions for Class 10 Science will make your practice complete.
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