... One student uses a lens of focal length 50 cm and another of –50 cm. Size of image can be found using the magnification formula m = h’/h = – (v/u) If m is -ve it is a real image and if it is +ve it is a virtual image. Light - Reflection and Refraction Class 10 Physics Complete 1. n = sin∠i/sin∠r = speed of light in medium 1/ speed of light in medium 2. The transverse nature of light can be demonstrated through polarization. 1. (d) Light gives us sense of vision. We will explore what rules govern them, their technical names and then apply these rules to study the beautiful world of curved mirrors and lenses. Q 11. Example: image formed by plane mirror or convex mirror. The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is (a) real, inverted and diminished (b) virtual, erect and smaller in size • Magnification of plane mirror is always + 1. Principal Axis: The line passing through the pole and the centre of curvature is the main or principal axis. Distances measured towards positive x and y axes (coordinate system) are positive and towards negative x and y-axes are negative. When light is incident on a curved surface and passes through, the laws of refraction still hold true. The distance of the object from the lens is 10 cm. Required fields are marked *, Chapter 10: Light Reflection And Refraction. ‘1’ indicates that image is equal to object’s size. → Mirrors whose reflecting surface is curved. Concave Mirror: A spherical mirror with the reflecting surface that bulges inwards. The incident ray, reflected ray and the normal all lie in the same plane. 1. Refractive index of one medium with respect to another medium is called relative refractive index. When the incident angle is greater than the critical angle, it reflects inside the denser medium instead of refracting. CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. nature of light and electromagnetic spectrum (mcqs) multiple choice questions for physics class 10th notes from chapter no 15 karachi board science group Adamjee Coaching Free Notes, MCQs, Online Test, Guess Papers and Past Papers for Class 9th, 10th, 11th, 12th (C) For solar furnace, we use a concave mirror. A full length image of a tall building/tree can be seen in a small convex mirror. Light is a form of energy that enables us to see things. The concept of light, reflection, and refraction is quite fascinating for the students of Class 10. This radius will intersect the mirror at the pole (P). → Speed of light is maximum in vaccum. Students can practice the NCERT MCQ Questions for Class 10 Science Chapter 10 Light Reflection and Refraction with Answers Pdf free download is available here. SOLUTION: Here, object distance (u) = –10 cm, NCERT Exemplar Class 10 Science is very important resource for students preparing for X Board Examination. To know more about Spherical Mirrors, visit here. → Cause of refraction: Change in speed of light. The mirror is … Important Question for Class 10 Science Light Reflection and Refraction PDF will help you in scoring more marks.. Revise all the concepts easily by taking help from the MCQ Questions for Class 10 Science with Answers are prepared based on the latest exam pattern. It is 3 × 10 8 m/s. The shortest path need not be the quickest path. Q2: Shadows formation shows that light (a) can travel in vacuum (b) travels in straight lines (c) exhibits wave nature. If an image formed is upside down then it is called inverted or else it is an erect image. (b) Name the point on the lens through which a ray of light passes undeviated. Introduction to Light – Reflection & Refraction. (a) If the image formed by a lens is diminished in size and erect,for all positions of the object, what type of lens is it? This phenomenon is known as Total Internal Reflection. It moves from rarer to denser medium and then again to the rarer medium. Spherical lenses formed by binding two spherical surfaces bulging outward are known as convex lenses while the spherical lenses formed by binding two spherical surfaces such that they are curved inward are known as concave lenses. Principal Axis: The line passing through the optical centre and the centre of curvature. Like all electromagnetic waves, light can travel through a vacuum. Find the position and nature of the image. Light Reflection and Refraction Class 10 Important Questions Long Answer Type. Question from very important topics are covered by NCERT Exemplar Class 10.You also get idea about the type of questions and method to answer in your Class 10th … This point is called as the focal point or focus. The Nature of Light •As a wave… –A small disturbance in an electric field creates a small magnetic field, which in turn creates a small electric field, and so on… •Light propagates itself “by its bootstraps!” –Light waves can interfere with other light waves, canceling or amplifying them! This property forms the basis of the fields of optics and optical communications and a myriad of related technologies, both mature and emerging.
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