given that the refractive index of flint glass is 1.7 and speed of light in air is 300 000kms-1, what is the speed of light in flint glass?
do i solve this using proportional or what? seems like there isn't any fixed formula.
refraction is due to speed in medium is slower than speed in vacuum/air.
refreactive index shows the relative speed of light in the two medium
1/1.7 x 300 000 is your answer
Originally posted by skythewood:refraction is due to speed in medium is slower than speed in vacuum/air.
refreactive index shows the relative speed of light in the two medium
1/1.7 x 300 000 is your answer
er... ok i think i remember something tht my physics teacher thought me
Reflective index = 3 X 10^8m/s ( or 300 000kms-1) / speed of light in given object
therefore in your case its
1.7 = 300 000 / speed of light in flint glass
1.7 X speed of light in flint glass = 300 000
speed of light in flint glass = 300 000/1.7
= 176470.5882 ( this makes sense as flint glass is denser than normal glass therefore its speed should be lower)
however im not totally sure bout my answer cuz it looks kinda wierd. if any1 found the right solution plz post
er... ok i think i remember something tht my physics teacher thought me
REFRACTIVE index = 3 X 10^8m/s ( or 300 000kms-1) / speed of light in given object
YES. Except a typo. But in exam a "write-po" and you're dead.
speed of light in flint glass = 300 000/1.7
You got the answer already.
must read textbook first then do qns.
Originally posted by davidche:must read textbook first then do qns.
no, should do questions first, dunno then search through textbook.
That's my method in which I'm trying to tell everyone at the moment... Self tried and tested during my final year in uni