Those light which allow all the light to pass through them are called __________________________

Examples of transparent materials are ____________

Light is the fastest thing in the universe that travels at a speed of _________

Certain substances emit light when rubbed or scratched . Such substances are called as _____________________________ substances

Objects which emit their own light are called ___________ substances

Objects which do not emit their own light are called___________ substances

When light hits an area and bounces back it is called:

The light that comes from the sun is a combination of seven different colours and is known as ________________________

Those which have been made by man are called man made or artificial sources of light

The size of our shadow changes according to the position of _______

Which of the following allow all the light to pass through them?

Opaque objects allow all the light to pass through them

True/False

On some days, the Moon comes exactly in between the sun and and the Earth and the shadow of the moon falls on the Earth. This is called a ____________

A pinhole camera is the simplest camera without a ______

A _________ occurs on a full moon day

______________ is an optical instrument that forms an image of an object on a screen

The principle behind the pin hole camera is