Laws of reflection are: (i) The incident ray, the reflected ray and the normal ray at the point of incidence, lie in the same plane. (ii) The angle of incidence is equal to the angle of reflection.
Table of Contents
What is reflection and Refraction class 10th?
Bouncing back of light rays after hitting any surface is called reflection of light. The densities of all media are different, hence the speed of light varies as it passes from one medium to the other. Bending of light rays as they pass from one medium to the other is called refraction of light.
What is reflection of light notes?
When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light. The incident light ray that land on the surface is reflected off the surface. The ray that bounces back is called the reflected ray.
What is light short notes?
Light is an electromagnetic radiation which can be detected by human eye. It shows the properties of both waves and particles. Light exists in tiny energy pockets known as photons. The light wave has frequency as well as wavelength.
What is reflection of light in physics class 10?
Reflection is the phenomenon of bouncing back of the rays of light when they fall on an obstacle. It is similar to the bouncing of a ball when we throw it on a rigid surface. When light rays fall on an object, some of them are reflected, some pass through it and the rest of the light rays are absorbed by the object.
What is mirror formula?
The relation between focal length of mirror, distance of the object and distance of the image is known as mirror formula. It is given by. u1+v1=f1.
WHAT IS lens formula?
What is the Lens Formula? According to the Convex Lens equation, the Lens formula is 1/f = 1/v + 1/u. It relates the Focal Length of a Lens with the distance of an object which is placed in front of it and the image formed of that object. Lens magnification is defined as the ratio of the image Length and object Length.
What are the 3 types of reflection?
Reflection is divided into three types: diffuse, specular, and glossy.
What are the 3 laws of reflection?
Solution : There are three laws of reflection
1. The angle of reflection is equal to the angle of incidence .
2. The incident ray, the reflected ray and the normal lie in the same plane.
What are the two types of reflection?
The reflection of light can be roughly categorized into two types of reflection. Specular reflection is defined as light reflected from a smooth surface at a definite angle, whereas diffuse reflection is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 3).
What are the properties of light?
The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum and polarization. Its speed in a vacuum, 299 792 458 metres a second (m/s), is one of the fundamental constants of nature.
What is the nature of light?
Light is a transverse electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum.
How many types of light are there?
There are four main types of lights, or light bulbs, currently available on the market: Incandescent. CFL, or compact fluorescent lamp. Halogen.
What are 3 examples of real reflection?
- Reflection of light in mirror.
- Reflection of light in spherical mirror.
- Reflection of light in water pool.
- Reflection of light on polished surface.
- Object seen due to reflection of light.
- Glowing of stars.
- Lighting of moon at night.
- Reflection from luminous object.
What is the formula of reflection of light?
Figure 1.5 The law of reflection states that the angle of reflection equals the angle of incidenceโ ฮธ r = ฮธ i . ฮธ r = ฮธ i .
What is the unit of mirror?
In a spherical mirror: The distance between the object and the pole of the mirror is called Object distance(u). The distance between the image and the pole of the mirror is called Image distance(v). The distance between the Principal focus and the pole of the mirror is called Focal Length(f).
What is image distance?
Image Distance, s’, is the distance from a lens or mirror to an image. โข Magnification, m, is the amount of size increase (or decrease) of the image as compared to the object. m = hi /ho โข Images are formed by lenses and mirrors where light rays cross or focus.
What is the state law of reflection?
Law of reflection is defined as: The principle when the light rays fall on the smooth surface, the angle of reflection is equal to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface all lie in the same plane.
What is the SI unit of power of lens?
Power of a lens is equal to reciprocal of the focal length of the lens.SI unit of power is dioptre (D).
What is the value of D in lens?
hence, d=10cm.
What is C in lens?
(a) Centre of curvature: It is the centre of the spheres of which each surface of the lens forms a part.Represented by C or 2f. (b) Principal axis: An imaginary straight line passing through the two centres of curvatures. (c) Optical centre: It is the central point of the lens.
What is reflected light called?
Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. This is called specular reflection.
What is law of reflection of light?
Definition of law of reflection : a statement in optics: when light falls upon a plane surface it is so reflected that the angle of reflection is equal to the angle of incidence and that the incident ray, reflected ray, and normal ray all lie in the plane of incidence.
What causes reflection?
Reflection occurs when light traveling through one material bounces off a different material. The reflected light still travels in a straight line, only in a different direction. The light is reflected at the same angle that it hits the surface. The angle of incidence is equal to the angle of reflection.
What are the types of mirrors?
- Plane mirror: The images formed from a plane mirror are the reflected images in their normal proportions but reversed from left to right.
- Convex mirror: These are the spherical mirrors that are curved outward and the image obtained is virtual, diminished and erect for a real object.
- Concave mirrors: