{"id":16202,"date":"2023-06-22T16:19:21","date_gmt":"2023-06-22T10:49:21","guid":{"rendered":"https:\/\/apboardsolutions.in\/?p=16202"},"modified":"2023-06-23T17:48:13","modified_gmt":"2023-06-23T12:18:13","slug":"ap-board-7th-class-science-notes-chapter-9","status":"publish","type":"post","link":"https:\/\/apboardsolutions.in\/ap-board-7th-class-science-notes-chapter-9\/","title":{"rendered":"AP Board 7th Class Science Notes Chapter 9 Reflection of Light"},"content":{"rendered":"

Students can go through AP State Board 7th Class Science Notes<\/a> Chapter 9 Reflection of Light to understand and remember the concept easily.<\/p>\n

AP State Board Syllabus 7th Class Science Notes Chapter 9 Reflection of Light<\/h2>\n

\u2192 Light coming from a narrow slit or small hole looks like a ray of light.<\/p>\n

\u2192 The ray of light falling on the mirror is called the incident ray.<\/p>\n

\u2192 The ray of light returning from the mirror is called the reflected ray.<\/p>\n

\u2192 The angle between the normal and the incident ray is called the angle of incidence \u2220i<\/p>\n

\u2192 The angle between the normal and the reflected ray is called the angle of reflection \u2220r<\/p>\n

\u2192 Periscope is used to view objects outside the room through the window while hiding oneself in the room.<\/p>\n

\u2192 In-plane mirror there will be a lateral inversion in the image formed for an object.<\/p>\n

\u2192 We get multiple images of an object placed in between the plane mirrors arranged at an angle to each other.<\/p>\n

\u2192 The image formed by a rearview mirror is smaller than the image in a plane mirror.<\/p>\n

\u2192 If the reflecting surface of a mirror is concave it is called a concave mirror.<\/p>\n

\u2192 If the reflecting surface is convex, then it is called a convex mirror.<\/p>\n

\u2192 The image that can be obtained on a screen is called a Real image.<\/p>\n

\"AP<\/p>\n

\u2192 The image that cannot be obtained on a screen is called a virtual image.<\/p>\n

\u2192 Reflection from a smooth surface like that of a mirror is called regular reflection.<\/p>\n

\u2192 Reflection from a rough or irregular surface is called irregular reflection or diffused reflection.<\/p>\n

\u2192 Light changes its direction when it is obstructed by any object. This phenomenon is called reflection.<\/p>\n

\u2192 The angle of incidence is equal to an angle of reflection. We denote the angle of incidence with \u2220i and the angle of reflection with \u2220r.<\/p>\n

\u2192 The measure of \u2220i = measure of \u2220r. (for a plane mirror)<\/p>\n

\u2192 In the image formed by a mirror, the right of the object appears as left, and the left of the object appears as right. This is called Lateral Inversion.<\/p>\n

\u2192 The distance from the object to a plane mirror is equal to the distance of the image from the mirror.<\/p>\n

\u2192 Irrespective of the size of the plane mirror, the size of the image in the mirror is equal to the size of the object.<\/p>\n

\u2192 Any object which is far away from us looks smaller in size. In the same way, its image in the plane mirror will also look smaller.<\/p>\n

\u2192 The plane mirror forms a single image. If we want to form multiple images two plane mirrors need to be kept at an angle.<\/p>\n

\u2192 The number of images increases when we reduce the angle between two mirrors.<\/p>\n

\u2192 In a rearview mirror (convex mirror) we get diminished Usage of the object.<\/p>\n

\"AP<\/p>\n

\u2192 In a mirror which is used by a Dentist (concave mirror), we get an enlarged image of the object<\/p>\n

\u2192 The image that can be obtained on a screen is called a Real Image.<\/p>\n

\u2192 The image that can\u2019t be obtained on a screen but can be viewed in the mirror is called a Virtual Image.<\/p>\n

\u2192 Torches, headlights of vehicles have concave mirrors behind the bulb for reflection.<\/p>\n

\u2192 Reflection from a smooth surface is called regular reflection.<\/p>\n

\u2192 Reflection from a rough surface is called an irregular reflection.<\/p>\n

\u2192 Incident Ray: A ray of light that hits a surface<\/p>\n

\u2192 Reflected Ray: The ray represents the light refracted by the surface<\/p>\n

\u2192 Normal: Usual<\/p>\n

\u2192 The angle of incidence \u2220i: The angle made by the incident ray with a normal<\/p>\n

\u2192 The angle of reflection \u2220r: The angle made by the retracted with normal<\/p>\n

\u2192 Periscope: Observation from a concealed position<\/p>\n

\u2192 Lateral inversion: The image formed in a flat mirror<\/p>\n

\u2192 Kaleidoscope: A cylinder with a mirror.<\/p>\n

\u2192 Rearview mirror: Mirror used in vehicles to see the vehicles behind them.<\/p>\n

\u2192 Spherical mirror: Mirror in the shape of a circle<\/p>\n

\u2192 Convex mirror: Curves outward towards a light source<\/p>\n

\u2192 Concave mirror: Curves inward to away the light source<\/p>\n

\u2192 Real Image: Image which can be seen with a help of source<\/p>\n

\u2192 Virtual image: Image which cannot be seen with a help of source<\/p>\n

\"AP<\/p>\n

\u2192 Regular Reflection: Reflection occurring on a smooth reflecting surface<\/p>\n

\u2192 Irregular Reflection: Reflection from a rough or irregular surface.
\n\"AP
\n\u2192 Christian Huygens:<\/p>\n