A pencil dipped inside a tumbler with water appears to be bent. How many mediums does the light from the pencil go through to reach the eyes of the observer?

The imaginary line drawn perpendicular to the interface between two mediums at the point of incidence is called the ____.

The eye lens focuses the light coming from an object on the ____.

This bending of light makes the lenses, magnifying glasses, and prisms functional, as they all ____ light rays entering them to accomplish their tasks.

A ray of light enters a rarer medium from a denser medium. It ____.

A glass slab ___ most of the light falling on them.

Why does a coin at the bottom of a tumbler filled with water appear to be raised?

A ray of light enters a denser medium from a rarer medium. It ____.

Pick the odd one out.

Magnifying glasses work on the principle of ____.

Air is a ____ object.

• Materials like air, water, and clear glass are called transparent.
• When light encounters transparent materials, almost all of it passes directly through them.

A partially immersed pencil in water appears bent because of ____.

Transparent objects are see-through, as they ____ the light falling on them.

Daniel wanted to design an aquarium on his own for his fish. He wants to see his fish swimming in the water all the time. Which of the following materials will be best suitable for this purpose?

Which of the following produce their own light?

A sheet of polythene is _____ and _____.