Refraction of Light - 8th Grade Science

These flashcards cover key concepts related to the refraction of light, including definitions, laws, and characteristics of images formed by different types of lenses.

What is refraction in the context of light?

Refraction is the bending of light as it passes obliquely from one transparent medium to another.

What does Snell's Law describe?

Snell's Law describes the relationship between the path taken by a ray of light as it passes obliquely from one transparent medium to another.

Define the term 'incident ray'.

An incident ray is the incoming ray of light that strikes the surface between two media.

What is a 'normal line'?

A normal line is an imaginary line drawn perpendicular to the refracting surface at the point where the light strikes.

What is the difference between a real image and a virtual image?

A real image can be cast or projected on a screen, while a virtual image cannot be cast on a screen.

Describe an upright image.

An upright image is an image that is not reversed.

What happens to light when it travels from a less dense medium to a denser medium?

When light travels from a less dense medium (like air) to a denser medium (like glass or water), it bends towards the normal.

What characteristics describe images formed by a double convex lens when the object is beyond 2F?

The image formed will be real, inverted, and smaller.

What is the behavior of light in a double concave lens?

The image formed by a double concave lens is always virtual, upright, and smaller.

How does the intensity of light change when passing from one medium to another?

The intensity of light decreases when it passes from one transparent medium to another because some of the light is partially reflected at the boundary.

What does the term 'refracted ray' refer to?

The refracted ray is the outgoing ray of light that bends as it passes into another medium.

What does it mean if an object is placed between the object and the focal point (F) of a lens?

It will produce a virtual, upright, and larger image.

How can the image size formed by a double concave lens be described?

The image size is always smaller than the object and cannot be larger or magnified.

What changes in angle occur when light travels from air to glass?

The angle of incidence is greater than the angle of refraction when light travels from air to glass.

How can the location of the image formed by a lens be determined?

The location of the image can be found by tracing at least two intersecting refracted rays that pass through the lens.