what is the approximate speed of light?

It is the light energy radiated out per second from the body in the form of luminous light waves.

A candela is a unit of what light parameters?

It is defined a the total flux in lumens over 4pi

what does acronym MHCP stands for?

It is measured as the luminous flux per unit area.

What is the unit of luminance?

What is the unit of lamp efficiency?

It is the flux emitted in a hemisphere divided by 2π

Unit of luminous flux is?

It is the quantity of light delivered in one hour by a flux of one lumen.

When the temperature is low, radiated energy is in the form of ______ only but when a certain temperature is reached, __________are also radiated out in addition to heat waves and the body becomes ________.

Is radiant energy which is assumed to be propagated in the form of transverse waves through an invisible medium known as ether.

the light that seems to radiate from an object being viewed.

is a strong, steady, dazzling light or reflection.

aspect of things that is caused by differing qualities of light being reflected or emitted by them.

the difference in brightness or the brightness ratio between and object and its background.

the degree to which light is shadowless, and is therefore a function of the number of directions to which light collides with a particular point and the comparative intensities.

Defined as the "bigness" of light source as seen by a receiver.

Solid Angle is measured in?

is defined as the ratio of the area of the light source when projected onto the surface of a sphere centered on the receiver.

It is defined as the flux contained per unit solid angle of a source of one candela or standard candle.

Approximate relation between lumen and electric unit of power is given as:

a point source in any particular direction is given by the luminous flux radiated out per unit solid angle in that direction. In other words, it is solid angular flux density of a source in a specified direction.

it is given by total flux (in Im) emitted in all directions in all planes divided by 4n. This average candle-power is also known as________

is defined as the luminous intensity per unit surface area of the projected surface in the given direction.

The unit of brightness is?

indicates the STRENGTH of the light emission

describes the amount of light that is radiated

indicated the illumination intensity of an area.

Is given by the ratio of the mean spherical candlepower to its mean horizontal candlepower.

is the ratio of the luminous flux to the power intake.