LIGHT, REFLECTION & REFRACTION

Front

What is the SI unit of power?

Back

The SI unit of power is the watt (W).

Front

What happens to a ray of light traveling perpendicular to the boundary of a parallel glass slab?

Back

The ray of light does not get refracted.

Front

Where does the image form when a point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm?

Back

The image forms behind the mirror.

Front

What is the behavior of a ray of light coming parallel to the principal axis after passing through a convex lens?

Back

It passes through the focus.

Front

Where should an object be placed to get a real magnified image in a convex lens?

Back

The object should be placed in between F and 2F.

Front

Define reflection of light.

Back

Reflection of light is the bouncing back of light rays when they hit a surface.

Front

What is refraction of light?

Back

Refraction is the bending of light rays as they pass from one medium to another with a different density.

Front

What is the focal length of a lens?

Back

The focal length is the distance from the lens to the focal point, where parallel rays converge.

Front

What is a convex lens?

Back

A convex lens is a lens that is thicker in the middle than at the edges and converges light rays.

Front

What is a concave mirror?

Back

A concave mirror is a mirror that curves inward and can produce real or virtual images.