To burn a candle in a glass full of water.
Light is a kind of energy or can be said it is an electromagnetic radiation which is visible to the human eye.
The incident light comes from the source and strikes the object.
Reflected light is the light that then bounces back off the object.
When you look at a mirror and see your face reflected, what's happening is reflection. The smooth surface of the mirror reflects light in a way that preserves much of its original quality, such as brightness and color.
Light interacts with the smooth surface of the mirror, and according to the law of reflection, the angle of incidence (the angle at which light strikes the mirror) is equal to the angle of reflection (the angle at which light reflects off the mirror). This process allows you to see an image of yourself in the mirror. The mirror doesn't emit light; it simply reflects the light that falls onto it.
From the above image we can observe a candle is burning in a glass full of water how?
A polished transparent material like plane glass, which can reflect a small amount of incident light, so we get an image of both the candle and water on the same plane of glass. An illusion is created by precisely positioning and aligning up two things that would not normally fit into one another. Both the glass of water behind it and the candle in front create an image in the plane of the glass sheet. This illusion is created by aligning these two images so that they perfectly overlap with one another.
The glass plate partially acts as a plane mirror. Therefore, the image of the candle is at the same distance behind the glass plate as that of the lighted candle in front of it.