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the new theory reconciles the particle properties of light with the wave nature. In this Chapter, we shall study the phenomena of reflection and refraction of light using the straight-line propagation of light.
It is only when light from an object enters our eyes that we see the object. The light may have been emitted by the object, or may have been reflected by it. You learnt in Class VII that a polished or a shiny surface can act as a mirror. A mirror changes the direction of light that falls on it.
Physical properties of light. Light consists of photons — “particles” with no mass which travel at the speed of light. ravel at the speed of light. They have energy, and one measure of this energy is the �. To a very good approximation, light travels in straight lines, and behaves much like a particle.
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Light: Visible radiant energy. Light source: Something that gives off light. Transmission: Light moves from one place to another without any change to the light, e.g., light moving through air. Natural light source: Something in nature that gives off light. Artificial light source: Something humans have made that gives off light. 1.
- Types of Reflection
- Laws of Reflection
- The Characteristics of The Image Formed by A Plane Mirror
- Human Eye and Its Parts
- The Law of Reflection
- Regular and Diffused Reflection
- Ch 13 Science Class 8 Notes: Properties of Mirror Image
- Class 8 Chapter 13 Science Notes: Braille System
- Notes of Chapter Light Class 8: The Anatomy of The Eye
- Why Choose Vedantu?
i. Regular Reflection:When a parallel beam of light rays incidents either on a smooth or on plane surface, the reflected rays will also be parallel. This is termed regular reflection. The reflection by a plane mirror is an instance of regular reflection. ii. Diffused or Irregular Reflection:When the light ray incidents on a rough or uneven surface,...
i. The angle of incidence is equal to the angle of reflection. ii. The incident ray, reflected ray and the normal drawn at the point of incidence to the reflecting surface lie in the same plane. iii. Lateral inversion is the effect made by a plane mirror in reversing images from left to right. For instance, our left hand will appear as right in the...
i. Is the same size as that of the object ii. Left-right inverted iii. Erect and virtual iv. Formed behind the mirror at the same distance as that of the object placed in front of the mirror. 8. Multiple images are formed when two mirrors are inclined to each other. 9. Sunlight, also known as white light, is made up of seven colors. The splitting o...
i. The front part of the eye is covered with a transparent spherical membrane known as the cornea. Light enters the eye by cornea. ii. Space present just behind the cornea contains a fluid known as aqueous humour. iii. Just behind the cornea is a muscular diaphragm, which is dark coloured and is known as the iris which has a small circular opening ...
Light behaves in a very predictable manner. If a ray of light is observed while it is reflecting and approaching off a flat surface, the behaviour of this light, when reflected, follows a predictable law called the Law of Reflection. The ray of light approaches the mirror and this ray is called Incident Ray and the ray of light that leaves the mirr...
Regular and diffused reflection is an important part of light chapter class 8 notes. Regular reflection happens at the surface of a plane surface such as a plane mirror. The reflected rays after a regular reflection are parallel. And diffused reflection occurs at a surface of any rough surface like cardboard.
There are several properties of an image formed by a plane mirror. They are: 1. They are of the same size as that of the object 2. Left-right inverted 3. Virtual and erect 4. It occurs behind the mirror at the same distance as the distance of an object in front of the mirror.
Braille system is an important part of class 8 science light chapter notes. It was discovered by Louis Braille specially designed for the blinds. It is a raised-dot writing which can be touched by the fingers and recognized. All the Braille characters are made of 6 dot positions which are arranged in a rectangle comprising a 2 column of 3 dots each...
The human eye, as vividly described in Class 8 Science Chapter 13 Notes, has the following parts from outside to inside: 1. The sclera which is also the white part of the eye protects our eyeball. 2. The pupil is the opening of the eye through which the light enters. 3. The iris surrounds the pupil and controls the amount of light that should enter...
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Apr 16, 2024 · Some essential properties of light include: Speed: Light travels at a constant speed of approximately 299,792 kilometers per second in a vacuum. Wavelength and Frequency: Light waves have specific wavelengths and frequencies, which determine their color and energy.
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Light Chapter of Class 8 Questions And Answers delves into the nature of light, how it travels, and its various phenomena, such as reflection and refraction.
