It is a bundle of light energy that travel in harmonic waves at the fastest speed possible in the universe

It is the lowest range of the EM spectrum, with frequencies up to about 30 GHz and wavelengths greater than about 10 mm.

It is produced by atomic nuclei and in the range of the spectrum above soft X-rays and have frequencies greater than about 10¹⁸ Hz and wavelengths of less than 100 pm

It is found between visible light and X-rays and has frequencies of about 8 x 10¹⁴ to 3 x 10¹⁶ Hz and wavelengths of about 380 nm to about 10nm

It is found between microwaves and visible light and has frequencies from about 30 THz up to about 400 THz and wavelength of about 100 micrometers to 740 nanometers

It comprises the range between UV and gamma rays and have a frequency of about 3 x 10¹⁶ to 10¹⁸ Hz and wavelength of about 10 nm to about 10 picometers

It is found between radio and IR with frequency from about 3GHz up to about 30 THz, and wavelength of about 10mm to 100 micrometers

It is found in the middle of the EM Spectrum, between IR and UV and has frequencies of about 400 THz to 800 THz and wavelengths of about 740 nm to 380nm

It is found between radio and IR with frequency from about 3GHz up to about 30 THz, and wavelength of about 10mm to 100 micrometers

it is the bouncing back of light wave after hitting any surface

it is the bending of light when it passes from one medium to another, of different optical density

It is a device which processes light wave to enhance an image for clearer view.

It is a the ray that hits the surface

It is the ray that bounce back from the surface

It is an angle between reflected ray and normal line

It is an angle between the incident ray and normal line

It occurs when light is reflected from a smooth surface at a definite angle

It produced when light is reflected from rough surfaces that tend to reflect light in all direction

It is a transparent medium that refracts light and is limited to two spherical surfaces.

It refers to a highly polished surface that usually made of glass, coated with silver or aluminum on one surface.

it is an optical instrument that uses converging lens

It is one with flat surface, an ordinary mirror that we usually use to see our exact image

It is a curved mirrors that can produce images that are different in shape, size, and orientation with respect to the original object

It is a plane mirror image inverted in horizontal orientation

It is a plane mirror image with same vertical orientation as the object

It is a plane mirror image located behind the mirror

It is a plane mirror image with same size as the object

It is a spherical mirror which converges its parallel light rays at the principal focus, also called converging mirror

It is a spherical mirror which also known as diverging mirror, spread out reflected rays from the principal focus

it is the point where parallel light rays converge or apparently diverge upon reflecting off from the surface

it is the center of the mirror.

it is the center of the mirror.

It is the middle part of the sphere from where the mirror is formed

it is the distance between principal focus and vertex

it is the distance between the Center of curvature and vertex

It refers to the opening of the mirror

it is a horizontal line joining center of curvature and vertex

It is the ratio between the speed of light in a vacuum to that in substance

It gives a quantitative description of the location, size, orientation, and type of image formed.

It is the point at which a convex lens converges light rays, and diverges light rays in case of concave lens

It is the the geometric center of the lens where light rays passing through is not refracted

It is a horizontal line that passes through the optical center and principal focus

It is a vertical line along which there is some degree of rotational symmetry in an optical system.

It is the distance between the principal focus and optical center

It open and closes the entire organ and protects the eyeball

It refracts and focuses the light rays

It regulates the amount of light entering the eye

It refracts the light rays further and focus the light rays on the retina of the eyes

It allows light to pass into the cornea, aqueous humor and the lens

It serves as a screen where the image is formed

It result from old age, distant objects are seen clearly, but nearby objects are blurred

It cannot focus on distant objects because their eyeballs are too long, or the lenses are too curved

It cannot focus on nearby objects because their eyeballs are too short, or the lenses are too flat

It cannot focus simultaneously on vertical and horizontal lines

It is a device that converts mechanical energy into electrical energy

It is a device that converts electrical energy into mechanical energy

It is a modern technology in transportation system that uses electromagnetism

It is discovered in the 1930’s by Michael Faraday which indicate the process by which a changing magnetic field generates electric current in a conductor.

It creates mechanical energy that the generator will convert into electricity

It converts mechanical energy produced by the engine into electric current

It generates electric voltage

It is required for oiling moving parts to ensure smooth functioning

It is a system that stores and pumps the appropriate fuel to the engine

The armature spins in the magnetic field set up by the magnet

It holds the insulated coils of wire, usually copper

Continuous coil of wire that carries current to and from a DC power supply

These are metallic contacts that stay fixed; they connect the armature to the battery so that a current is maintained in the coil

It is a pair of semicircular metallic contacts that attached to the end of the wire loop

This maintains a steady flow of current in one direction