JSC Science Note 11th Chapter Light

JSC Science Note 11th Chapter Light. The branch of physics dealing with the properties and behavior of light is called optics. Light is a form of energy which helps us to see the objects. Have you ever wondered why we are able to see the different objects around us, their images in a mirror or in a pond? This is simply due to the reflection of light. It is the phenomenon of bouncing back of light after striking a smooth polished surface. Why is the word “ambulance” written backward in ambulance car? This is due to lateral inversion -The phenomenon due to which the left side of an object appears to be the right side of the object in its image in a reflecting medium (mirror ) and vice-versa is called the lateral inversion. Enjoy interesting trivia related to spherical mirrors(concave and convex) and the plane mirror, optics, sunlight. Understand the differences between mirrors and lenses. Learn about the formation of rainbow. Did you know that you can see a rainbow only when your back is towards the sun?

JSC Science Note 11th Chapter Light

JSC Science Note 11th Chapter Light

আলো

JSC Science Note 11th Chapter Light

JSC Science Note 11th Chapter Light

Light travels in a straight line as long as it is traveling in the same medium. This is referred to as rectilinear propagation of light. An object that emits light on its own is called luminous object. The sun and the stars are natural luminous sources of light. If an object does not emit light of its own, it is said to be a non-luminous object. The moon is a non-luminous body as it shines due to reflected sunlight. Non-luminous objects can be classified into opaque, translucent and transparent objects.

Reflection of light refers to the phenomenon in which a beam of light, when incident on a surface, returns into the same medium. There are two types of reflection – regular reflection and irregular or diffused reflection. When light is reflected, it follows two laws called laws of reflection. 

A spherical mirror is obtained by taking a part of a thin hollow sphere of glass or metal. Its reflecting surface is the curved part of a hollow sphere. It can either be concave or convex. The terms that are often used in the study of spherical mirrors are the center of curvature, the radius of curvature, pole, principal axis, focus and focal length.

teachingbd24.com is such a website where you would get all kinds of necessary information regarding educational notes, suggestions and questions’ patterns of school, college, and madrasahs. Particularly you will get here special notes of physics that will be immensely useful to both students and teachers. The builder of the website is Mr. Md. Shah Jamal Who has been serving for 30 years as an Asst. Professor of BAF Shaheen College Dhaka. He expects that this website will meet up all the needs of Bengali version learners /students. He has requested both concerned students and teachers to spread this website home and abroad.

বিজ্ঞান বিষয়ের অন্যান্য অধ্যায়ের নোটের জন্য এখানে ক্লিক করুন।