Electomagnetic wave frequency and photons

[donaldson1967]

If i calculate the frequency of light with λ = 600nm ...
Frequency (v) = c/λ
= 49.9654 x 1012 Hz (waves per second)
Can i say this is the frequency of photons i.e. 49.9654 x 1012 Hz (waves per second)
Thanks DD

 

[stevenb]

If i calculate the frequency of light with λ = 600nm ...
Frequency (v) = c/λ
= 49.9654 x 1012 Hz (waves per second)
Can i say this is the frequency of photons i.e. 49.9654 x 1012 Hz (waves per second)
Thanks DD

The exponent should be 14 and not 12, but yes this is the frequency of the photons.

 

[donaldson1967]

thanks - but i still calculate it as

λ = 600nm
c = 299792458 m/s
Frequency (v) = c/λ
= 49.9654 x 10*12 Hz

not 10*14

??

 

[Dale]

(299 792 458 (m / s)) / (600 nm) = 4.99654097 × 10^14 hertz

 

[donaldson1967]

okay
i still get 49.9654 x 10*12 Hz
going a bit crazy
sorry i must be gaving a cerebral infarct
BUT 600 nm = 600 x10-9?
so 299 792 458 / 600 x 10 -9 = .. 4.99 x 10*13 = 49.9 x 10*12?

 

[stevenb]

okay
i still get 49.9654 x 10*12 Hz
going a bit crazy
sorry i must be gaving a cerebral infarct
BUT 600 nm = 600 x10-9?
so 299 792 458 / 600 x 10 -9 = .. 4.99 x 10*13 = 49.9 x 10*12?

Try it approximately first.

f=c/\lambda=3x10⁸/6x10^-7=0.5x10¹⁵=5x10¹⁴

 

[donaldson1967]

Okay- thanks a million- sorry for being a bit inadequate
d

 

[stevenb]

Okay- thanks a million- sorry for being a bit inadequate
d

The mind does strange things to us sometimes, doesn't it?

Unfortunately, it gets worse as we get older.

 

[donaldson1967]

Excellent news - something else to look forward to (along with general physical decay)- thanks again - great help
DD