Is-the-Light-a-matter-

Question Number 171044 by sciencestudent last updated on 06/Jun/22

I s t h e L i g h t a m a t t e r ?

Commented by mr W last updated on 06/Jun/22

d o e s i t m a t t e r i f {i t}^{'} s n o t a m a t t e r ?

Commented by peter frank last updated on 07/Jun/22

matter is any thing that has mass

and accupied the space

Commented by wuzie last updated on 07/Jun/22

m a t t e r i s a n y t h i n g t h a t h a s m a s s

a n d o c c u p y s p a c e

l i g h t h a s t i n y p a r t i c l e s c a l l e d

p h o t o n s w h i c h c o n s e r v e s e n e r g y

a c c o r d i n g t o E = {M C}^{2}

e n e r g y c o n s e r v e s i b l e a t a n

e l e c t r o m a g n e t i c s p e e d s p e c t r u m

w h u c h p h o t o n h a s . t o m a t t e r

w h i c h m a t t e r e n t a i l s m a s s

Answered by aleks041103 last updated on 09/Jun/22

I t d e p e n d s o n h o w y o u d e f i n e m a t t e r .

B y m o d e r n p h y s i c s s t a n d a r t s, l i g h t i s

c o m p r i s e d o f p h o t o n s - p a r t i c l e s t h a t

a r e e x c i t a t i o n s i n t h e q u a n t u m b o s o n i c

E M f i e l d . T h a t i s w h y w e c a l l l i g h t

b o s o n i c m a t t e r . B u t h e r e t h e w o r d

^{'} {m a t t e r}^{'} i s u s e d f o r a l a c k o f a b e t t e r o n e .

U s u a l l y, b y m a t t e r w e m e a n s o m e t h i n g

t h a t c a n o c c u p y s o m e v o l u m e o f s p a c e t i m e .

B o s o n i c m a t t e r {d o e s n}^{'} t .

O n t h e o t h e r h a n d, f e r m i o n i c m a t t e r

d o e s, s i n c e i t o b e y s a P a u l i e x c l u s i o n

p r i n c i p l e o f s o r t s .

T h e r e f o r e, i f y o u d e f i n e m a t t e r a s

t h e q u a n t i t y c o m p r i s i n g a n y t h i n g,

t h e n y o u r q u e s t i o n b e c o m e s t r i v i a l -

l i g h t i s m a t t e r .

B u t i f b y m a t t e r y o u m e a n s t h t h a t

o c c u p i e s s o m e f i n i t e v o l u m e, t h e n

m a t t e r a n d f e r m i o n i c m a t t e r b e c o m e

t h e s a m e t h i n g . T h e n, b y t h i s d e f i n i t i o n

l i g h t i s n o t m a t t e r .