it is a form of an EM wave that is propagated perpendicular to the source of energy

can travel in a straight path

is when light bounces off an object.

is a type of surface reflectance often described as a mirror-like reflection of light from the surface.

is the reflection of light from a surface such that an incident ray is reflected at many angles, rather than at just one angle

When light travels from air into water, it slows down, causing it to change direction slightly

in refraction of light, the amount of bending depends on two things:

are optical devices that permit the reflection of light

A mirror can be

a spherical mirror can be either

makes an image of objects in front of the mirror; these images appear to be behind the plane in which than mirror lies.

the rays of light actually meet afterthe rays of light actually meet after reflection

it appears to meet but not actually meet

- a method of tracing the path that light takes in order for an individual to view a point on the image of an object

is the process of making something looks bigger than it is to see object in detail. This is the measure of the size of an image compared to the size of the object

is the line joining the centers of curvatures of its surface.

of a curve is found at a point that is at a distance from the curve equal to the radius of curvature lying on the normal vector.

is a type of spherical mirror in which, the reflecting surface is the inner curved surface of the sphere

in this type of mirrors the reflecting surface seems to be away from the incident light source.

they are also called as converging mirrors and used for focusing light

If the cut part of the hollow sphere is painted from inside, then its outer surface becomes the reflecting surface.

is also known as a diverging mirror as this mirror diverges light when they strike on its reflecting surface.

is a sensory organ that reacts to visible light and allows humans to use visual information for various purposes including seeing things, keeping balance, and maintainingis a sensory organ that reacts to visible light and allows humans to use visual information for various purposes including seeing things, keeping balance, and maintaining circadian rhythm

Light proof fibrous tissue

Prevents internal reflection, supplies cells with oxygen and food, removes waste

Light sensitive layer, contains Rods and Cones

Contains cones which work in bright light and gives us our sense of color

Carries impulses to the brain

Jelly -like material which maintains the shape of the eye

Involved in focusing

Control the amount of light entering the eye

Hole in the iris which allows the light through

Transparent front part of the eye where the greatest amount of refraction (bending) of light occurs

Used to focus objects onto the retina

Maintains the shape of the eye

Protects the Cornea

These are the devices that process light waves to enhance an image for a more clear view.

is a laboratory instrument used to examine objects that are too small to be seen by the naked eyis a laboratory instrument used to examine objects that are too small to be seen by the naked eye

Also called field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes when viewing distant objects.

is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.

is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope).

is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image.

is an optical instrument that uses a system of prisms, lenses or mirrors to reflect images through a tube

is an optical instrument that can capture image either 2D or 3D images.

that allows light to pass through in order to capture an image on a light-sensitive surface (usually a digital sensor or photographic film).

focus the light entering the camera, and the aperture can be narrowed or widened.

mechanism determines the amount of time the photosensitive surface is exposed to the light.

is the phenomenon associated with either stationary or moving electric charges.

is defined as the physical phenomenon produced by moving electric charge

Four types of magnets

Like poles of a magnet repel each other

electromagnetism comes from a combination of the Greek works _____ meaning _________

Magnetis Lithos

is a device which is used to produce electric energy, which can be stored in batteries or can be directly supplied to the homes, shops, offices, etc.

a copper coil tightly wound onto a metal core) is rotated rapidly between the poles of a horseshoe type magnet.

is connected to a shaft of a mechanical energy source such as a motor and rotated. The mechanical energy required can be provided by engines operating on fuels such as diesel, petrol, natural gas, etc.

is a machine that can convert electric energy into mechanical energy (specifically kinetic energy, or the energy of motion). This is typically achieved by exploiting the relationship between electricity and magnetism.

The human eye can focus on an object at a near-point distance of

is the eye part that contains receptors for sighting shapes

is a device that converts electrical energy into mechanical energy.

is a type of lens that is thicker at the center than at the edges.

is a special kind of magnet produced by an electric current.

true or false: concave mirrors from a both real and virtual image

The incident light is reflected inwards (converged).

Virtual, erect, and diminished images are always formed with this mirror.

This is also known as a diverging mirror as this mirror diverges light when it strikes on its reflecting surface.

Visible light has a range of wavelength between

true or false: Light behaves both like a particle and a WAVE

identify the parts of the eye