PHYSICS TRUE / FALSE

A rainbow is formed because water droplets of the atmosphere behave like glass slabs.

The angle through which the incident ray is deviated by the prism is called the angle of deviation.

A prism is a glass block that has a rectangular cross section, formed by three triangular faces.

The ray of light emerging out of a glass slab is always parallel to the incident ray.

Light travels faster in air than in water.

A real image is always erect.

A concave mirror is used in solar heaters.

An incident ray passing through the focus of a convex mirror goes undeviated after reflection.

The geometrical centre of a spherical mirror is called its pole.

A spherical mirror is a part of a hollow glass sphere that is polished on one side.

A ray of  .light parallel to the principal axis, after reflection from a concave mirror, will pass through the centre of curvature.

A ray of light incident at the pole of a spherical mirror is reflected along a path, making the same angle with the principal axis, as the incident ray does.

While sketching ray diagrams, the object should always be kept in front of the polished surface.

The focal length of a spherical mirror is twice the radius of curvature.

A concave mirror is also known as a diverging mirror.