Science Fill in the blank

Medium 2 is said to Refraction medium 1 if light refracted in going from 1 to 2 bends Refraction normal.
Explanation:
The bending of light as it passes from one medium to another is called refraction. The angle and wavelength at which the light enters a substance and the density of that substance determine how much the light is refracted.

For a convex mirror, parallel rays of light appear to diverge from a point called the Principle focus.

A convex lens converges rays of light, whereas a concave lens diverges rays of light.

Lenses refract light to form images, a converging lens can form both real and virtual images, but a diverging lens forms only virtual images.

A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from focus after reflection from the mirror.

Convex mirror mirror is a spherical mirror whose reflecting surface is curved inwards.
Explanation:
A spherical mirror whose reflecting surface is curved outwards is called convex mirror.

The image in a convex lens depends upon the distance of the Object from the lens.

The reciprocal of the focal length in metres gives you the Power of the lens, which is measured in dioptres.

The focal length of a concave mirror is the distance from the Principle focus to the mirror.

When light is reflected, the angles of incidence and reflection are Equal.

Refractive index.

Parallel rays of light are refracted by a convex lens to a point called the focus.

Parallel rays of light are reflected by a concave mirror to a point called the Principal focus.

Light travelling along a normal is not.

The SI unit of power of a lens is Dioptre.
Explanation:
SI unit of power of lens is dioptre.

For converging lenses, the power is positive while for diverging lenses, the power is negative.

Light bends when it passes from water into air. We say that it is refracted.

A concave mirror Converges rays of light whereas a convex mirror Diverges rays of light.

Convex mirrors have Bigger in comparison to concave mirrors.
Explanation:
The object in the image formed by the concave mirror look bigger than the original size of the object.

1. If the magnification has a plus sign, then image Virtual is and Erect.
2. If the magnification has a minus sign, then the image is Real and inverted.