light __ grade 8th SCIENCE

the speed of light in vaccum...

what is an ray of light ....

what is Beam of light????

what is luminous? and non luminous..

what is transparent material?

what are translucent and opaque materials?

what is shadow?

umbra and penumbra??

what is an incident ray?

• light ray which is reflected.

• light ray stirking the surface,

• light ray which staight to npath along

the angle of incident is equal to

• angle of rays

• angle of reflection

• angle of normal