Light is a type of energy that our eyes can detect as radiation. We can see our surroundings because of light. Light travels in a straight line from one place to another.
Reflection of Light.
A Curved Mirror is either bulged in or bulged out. The surface can either be convex or concave.
The image will be called Inverted if it is formed upside-down, set side by side to the object.
Left-right inversion of the image.
The image formed by the mirror is always left-right inverted. This means that the right side of the object appears on the left side of the image, and the left side of the object appears on the right side of the image.
Why is the word ‘AMBULANCE’ painted on an ambulance left-right inverted?
This is because of the upside-down left-right image on a mirror. The word ambulance written as left-right inverted would be read easily by the driver of the vehicle ahead of the ambulance in its rear-view mirror. The rear-view mirror will again upturn the word left-right wise.
Normal- At the point of incidence of Incident Ray, the normal is a line that is perpendicular to the reflected plane.
Types of Reflection
Depending upon the surface of the reflecting object, the reflection of light may differ.
A spherical mirror is a mirror that has a sphere-like shape. It seems as if it is a part of a sphere. There are two kinds of spherical mirrors:
The Image formed by a Concave and Convex Mirror
An image can be of two types:
|The real image is formed when the light rays reflect and converge at the same point.||When light rays reflect and separate from the same place, a virtual image is created.|
It can be observed on a screen.
It cannot be observed on the screen.
It is always inverted.
It is always perpendicular.
It is formed by a concave mirror
It is formed by Concave, Convex, and Plane Mirrors
Properties of an image formed by a concave mirror:
Properties of an image formed by a convex mirror:
Applications of Concave Mirrors:
Applications of Convex Mirrors
A lens is a part of a reflecting material like glass but curved from two sides. Lenses are different from mirrors that have a reflecting surface only on one side. Depending upon its shape a lens can be classified as
Images formed by Convex and Concave Lenses
A Convex lens forms an image that is:
A Concave lens forms an image that is:
What is a Rainbow?
Q1. State the characteristic of the image formed by a plane mirror.
Ans: Characteristics of an image formed by a plane mirror are:
Q2. What is a virtual image? Give one circumstance where a virtual image is formed.
Ans: Virtual image: When light rays seem to originate at a spot but do not intersect, a virtual image is created. It is visible to human eyes. As a result, rear-view mirrors generate virtual images. The circumstances where a virtual image is formed:
Q3. Give one advantage of a concave and a convex mirror.
Ans: Advantage of the concave and convex mirror:
Q4. What type of lens always creates a real image?
Ans: Neither concave nor convex lens at all times forms a real image. A convex lens forms both real and virtual images. A concave lens creates virtual, erect, and diminished images.
Q5. What type of lens always creates a virtual image?
Ans: The type of lens which always creates a virtual image is: