Explain how the position of an image is located for spherical minor by considering the different rays using necessary ray-diagrams.Write answers of the given question.
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Spherical Mirror
Consider a glass with a hollow sphere and a reflecting surface. This reflecting hollow surface of sphere of which either sides are polished, forms the spherical mirrors. Spherical Mirrors are of two types: (a) Concave Mirror
(b) Convex Mirror
Consider the diagram given below. The inward curved reflecting surface of the spherical mirror as seen in the figure below is known as Concave Mirror and the outward curved reflecting surface of the same spherical mirror is known a Convex Mirror.
Incident Ray, Normal and the Reflected Ray
When a light travels from a point and strikes a reflecting surface making an angle with the normal which is perpendicular to the surface, then the light gets reflected at the same angle that it formed with the normal. The light that is travelling and incident on the surface is known as the Incident Rayand the perpendicular that is drawn to the reflecting surface is known as Normal.The portion of the light that gets reflected is known as the Reflected Ray.
Pole and Optical Centre
The centre of a spherical mirror is known as Pole and the centre of a spherical lens is known as Optical Centre.
Types of Reflection
The reflection of the light depends on the surface of the material it is incident on. Thus reflection can be classified into two types based on the surface:
(a) Regular Reflection: When the surface on which the light is incident is smooth and does not have any irregularities then the reflection is known as Regular Reflection.
(b) Diffused Reflection: When the surface on which the light is incident has deformities, that is, it is not smooth then the reflection is known as Diffused Reflection. Diffused reflection does not help in forming images of the object. For Example, when light falls on paper we do not see any reflection or image formation. This is because the surface of the paper is rougher than the surface of the mirror.
Laws of Reflection
(a) The angle between the incident ray and normal that is, angle of incidence is always equal to the angle between normal and reflected ray that is, angle of reflection
(b)The ray which is incident on the surface, the normal and the ray which is reflected back lies on the same plane
Types of Images
(a) Real Image: When the image is formed on the same side as that of the mirror, then the image is known as Real Image. In other word, if the image can be tossed on the screen, it is a real image.
(b) Virtual image: If the image cannot be tossed on a screen and is formed on the other sides of the mirror by external extension of rays, then the image formed is known as Virtual Image.
Consider a glass with a hollow sphere and a reflecting surface. This reflecting hollow surface of sphere of which either sides are polished, forms the spherical mirrors. Spherical Mirrors are of two types: (a) Concave Mirror
(b) Convex Mirror
Consider the diagram given below. The inward curved reflecting surface of the spherical mirror as seen in the figure below is known as Concave Mirror and the outward curved reflecting surface of the same spherical mirror is known a Convex Mirror.
Incident Ray, Normal and the Reflected Ray
When a light travels from a point and strikes a reflecting surface making an angle with the normal which is perpendicular to the surface, then the light gets reflected at the same angle that it formed with the normal. The light that is travelling and incident on the surface is known as the Incident Rayand the perpendicular that is drawn to the reflecting surface is known as Normal.The portion of the light that gets reflected is known as the Reflected Ray.
Pole and Optical Centre
The centre of a spherical mirror is known as Pole and the centre of a spherical lens is known as Optical Centre.
Types of Reflection
The reflection of the light depends on the surface of the material it is incident on. Thus reflection can be classified into two types based on the surface:
(a) Regular Reflection: When the surface on which the light is incident is smooth and does not have any irregularities then the reflection is known as Regular Reflection.
(b) Diffused Reflection: When the surface on which the light is incident has deformities, that is, it is not smooth then the reflection is known as Diffused Reflection. Diffused reflection does not help in forming images of the object. For Example, when light falls on paper we do not see any reflection or image formation. This is because the surface of the paper is rougher than the surface of the mirror.
Laws of Reflection
(a) The angle between the incident ray and normal that is, angle of incidence is always equal to the angle between normal and reflected ray that is, angle of reflection
(b)The ray which is incident on the surface, the normal and the ray which is reflected back lies on the same plane
Types of Images
(a) Real Image: When the image is formed on the same side as that of the mirror, then the image is known as Real Image. In other word, if the image can be tossed on the screen, it is a real image.
(b) Virtual image: If the image cannot be tossed on a screen and is formed on the other sides of the mirror by external extension of rays, then the image formed is known as Virtual Image.
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