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- → Electromagnetic wave, so does not require any medium to travel. → Light tends to travel in straight line. → Light has dual nature i.e. wave as well as particle. → Light casts shadow. → Speed of light is maximum in vaccum. Its value is 3 × 10 ms.
classrankers.com/ncert-notes/light-reflection-and-refraction-revision-notes-for-class10-scienceNCERT Revision Notes for Chapter 10 Light– Reflection and ...
Jan 22, 2024 · A ray of light which is parallel to the principal axis of a spherical mirror, after reflection converges or diverges from focus. A ray of light passing through or appearing from the center of curvature of spherical mirror is reflected back along the same path.
- CBSE Notes for Class 10 Science
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- CBSE Notes for Class 10 Science
- Introduction to Light – Reflection & Refraction
- Chapter Summary Video
- Laws of Reflection
- Spherical Mirrors
In Class 10 Science Chapter 10 Light, the phenomena of reflection and refraction of light using the straight-line propagation of light are taught to students. Furthermore, optical phenomena in nature are examined. The reflection of light by spherical mirrors is discussed in the chapter so that their applications are studied in real-life situations.
Light: Definition
Light is a form of energy that enables us to see things. Light starts from a source and bounces off objects which are perceived by our eyes, and our brain processes this signal, which eventually enables us to see. Maxwell predicted that magnetic and electric fields travel in the form of waves, and these waves move at the speed of light. This led Maxwell to predict that light itself was carried by electromagnetic waves, which means that light is a form of electromagnetic radiation.
Nature of Light
Light behaves as a: 1. ray, e.g. reflection 2. wave, e.g. interference and diffraction 3. particle, e.g. photoelectric effect According to the concept of wave-particle duality in quantum mechanics, light exhibits both particle and wave nature, depending upon the circumstances. A phenomenon like diffraction, polarisation and interference could be explained by considering light as a wave. A phenomenon like the photoelectric effect is explained by assuming that light consists of particles called...
Light Incident on the Surface Separating Two Media
When light travels from one medium to another medium it either: 1. gets absorbed (absorption) 2. bounces back (reflection) 3. passes through or bends (refraction) When light is incident on a plane mirror, most of it gets reflected, and some of it gets absorbed in the medium.
Characteristics of Light
1. The speed of light is given as c=λμ, where λ is its wavelength and μ is its frequency. 2. The speed of light is a constant which is 2.998×108m/s or approximately 3.0×108m/s. To know more about Properties of Light, visit here.
Reflection of Light by Other Media
A medium that is polished well without any irregularities on its surface will cause regular reflection of light. For example, a plane mirror. But even then, some light gets absorbed by the surface.
Spherical Mirror
Consider a hollow sphere with a very smooth and polished inside surface and an outer surface with a coating of mercury so that no light can come out. Then if we cut a thin slice out of the shell, we get a curved mirror, which is called a spherical mirror.
Relationship between Focus and Radius of Curvature
Focal length is half the distance between the pole and the radius of curvature.
Curved Mirror
A mirror (or any polished, reflective surface) with a curvature is known as a curved mirror.
- 49 min
Aug 9, 2017 · Properties of Light → Electromagnetic wave, so does not require any medium to travel. → Light tends to travel in straight line. → Light has dual nature i.e. wave as well as particle. → Light casts shadow. → Speed of light is maximum in vaccum. Its value is 3 × 10 8 ms-1. → When light falls on a surface, following may happen: (i ...
Light of Class 10. Light is a form of electromagnetic energy that causes the sensation of vision. NATURE OF LIGHT. The study of light is called optics and is classified in the following ways: OPTICS: It is the branch of physics which deals with the study of light. It is mainly divided into three parts:
Dec 12, 2023 · NCERT Notes for Class 10 Physics Chapter 10 Light – FAQs 1. What is Light? It is an electromagnetic device that can be visible to humans and help humans to see the object. 2. What is Pole of Spherical Mirror? The middle point P of a spherical mirror is called Pole. 3. What is Principal Axis?
Properties of Light. Answer. → Electromagnetic wave, so does not require any medium to travel. → Light tends to travel in straight line. → Light has dual nature i.e. wave as well as particle. → Light casts shadow. → Speed of light is maximum in vaccum. Its value is 3 × 10 ms. → When light falls on a surface, following may happen: (i) Reflection.
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Light reflection and refraction class 10 notes. Table of contents. Introduction to light. Reflection of light. Real and Virtual images. Spherical Mirrors. Image formation by spherical mirrors. Sign convention for reflection by spherical mirrors. Mirror formula and magnification. Refraction of light. Refraction through a rectangular glass slab.
