Besaran cahaya: Perbedaan antara revisi

{| class="wikitable" width="100%"

|-

| ''I''

| watt/steradian

| power per unit solid angle

|-

| ''L''

| watt/steradian/square meter

| power per unit solid angle per unit ''projected'' source area called ''intensity'' in some other fields of study

|-

| ''E'', ''I''

| watt/square meter

| power incident on a surface, sometimes confusingly called ''intensity''

|-

| ''M''

| watt/square meter

| power emitted from a surface

|-

| ''J'' or ''J''_{<math>\lambda</math>}

| watt/square meter

| emitted plus reflected power leaving a surface

|-

| ''L''_{<math>\lambda</math>} {{br}}or{{br}} ''L''_v

| watt/steradian/meter³ {{br}}or{{br}} watt/steradian/square meter/hertz

|-

| Spectral irradiance

| ''E''_{<math>\lambda</math>} {{br}}or{{br}} ''E''_v

| watt/meter³ {{br}}or{{br}} watt/square meter/hertz

|-

!colspan="5"|SI photometry units

 

== Sumber Cahaya ==

** [[bola lampu]]

** [[matahari]]

** partikel padat bercahaya dalam suhu tinggi(lihat [[api]])

** [[laser]] dan [[maser]]

** [[light emitting diode]]

== Referensi ==

{{reflist}}

 

{{Fotografi-stub}}