Science Light – Reflection and Refraction

Flashcards covering key concepts related to light, reflection and refraction, and properties of mirrors and lenses.

Light is made visible when it __ and the reflected light enters our eyes.

is reflected by an object.

The angle of incidence is __ to the angle of reflection.

equal.

In the reflection of light, the incident ray, the normal, and the reflected ray all lie in the __.

same plane.

A spherical mirror whose reflecting surface is curved inwards is called a __ mirror.

concave.

The center of curvature of a concave mirror lies __ to the reflecting surface.

in front of.

The distance between the pole and the principal focus of a spherical mirror is called the __.

focal length.

The focal length (f) of a spherical mirror is related to the radius of curvature (R) by the equation __.

R = 2f.

When an object is placed at infinity in front of a concave mirror, the image formed is __.

point-sized, real, and inverted.

The image formed by a concave mirror between the principal focus and the mirror is __.

virtual and erect.

For a convex mirror, the image formed is always and regardless of the object position.

virtual; erect.

The law of refraction is also known as __ law, which states the relationship between the angle of incidence and the angle of refraction.

Snell's.

Optically denser media have __ refractive indices compared to rarer media.

higher.

A transparent material bound by two spherical surfaces is called a __.

lens.

The power of a lens is defined as the __ of its focal length.

reciprocal.

The SI unit of power of a lens is __.

dioptre.

When light travels from one medium to another, the phenomenon is called __.

refraction.

The distance from the optical center of a lens to its principal focus is called the __ of the lens.

focal length.

The magnification produced by a lens is the ratio of the of the image to the of the object.

height; height.

If the image distance (v) is positive, the image formed is __.

real.

The ratio of the speed of light in vacuum to that in a medium is called the __ of the medium.

refractive index.

When a ray of light travels from a rarer medium to a denser medium, it bends __ from the normal.

towards.

When a ray of light is incident normally on the interface of two media, it passes through without __.

any deviation.