1. what is the frequency (f) of green light which has a wavelength of 4.90 x 10^-7 m?

Question

2. an X ray has a wavelenght of 1-15 x 10-10m. what is its frequency?

Answer choice
1. A. 2.61 x 10^18 cyc/s
B. 6.12 x 10^14 cyc/s
C. 1.47 x 10^2 cyc/s
D. 3.45 x 10^2 cyc/s

2. A. 2.61 x 10^18 cyc/s
B. 6.12 x 10^14 cyc/s
C. 1.47 x 10^2 cyc/s
D. 3.45 x 10^2 cyc/s

az_lender · Answer

#1.  f*lambda = 3.00 x 10^8 m/s =>
f = (3.00 x 10^8 m/s)/(4.90 x 10^(-7)m)
= about 6 x 10^14 cycle/sec, use calculator.
#2.  Is that 1.15 x 10^(-10) m?  Then
f = (3.00 x 10^8 m/s)/(1.15 x 10^(-10) m)
= 2.6  x 10^(18) cycle/sec.

1. what is the frequency (f) of green light which has a wavelength of 4.90 x 10^-7 m?

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