LIGHT

Laws of reflection (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.

Light is an electromagnetic wave , It provides sensation of sight . Light travels in a rectilinear motion .

ii ) concave mirror

White light is composed of seven colours. these are voilet ,indigo, blue ,green,yellow , orange and red.

A concave lens always forms erect, virtual and smaller image than the object.

A convex lens can form real and inverted image. When the object is placed very close to the lens, the image formed is virtual, erect and magnified. When used to see objects magnified, the convex lens is called a magnifying glass.

Image formed by a convex mirror is erect, virtual and smaller in size than the object.

A concave mirror can form a real and inverted image. When the object is placed very close to the mirror, the image formed is virtual, erect and magnified.

An image formed on a screen is called a real image. The image could not be obtained on a screen. Such an image is called a virtual image.

The word ‘AMBULANCE’ is written as in laterally inverted. When the driver of a vehicle ahead of an ambulance looks in her/his rear view mirror, she/he can read ‘AMBULANCE’ written on it and give way to it. It is the duty of every one of us to allow an ambulance to pass without blocking its …

Why is AMBULANCE written laterally inverted on an Ambulance van? Read More »