Question

write exponents as x.xxEy example 1.15E5 instead of 1.15 x 105 Calculate the wavelength in nm and frequency in s-1 of a photon with an energy of 7.55 x 10-18 How many photons are in a 2.67 m) sample If an electron requires a 300 nm energy wavelength will the wavelength above have enough energy? (write yes no or depends)

Answer 1

Energy, 7.55x10-189 for wave length E = hc a h> planck's constant 26.63X10-345.5 Wanel elength (→ speed of liqut = 3x10m's 34 6:63x10 8 å hc 3X10 2 so 7.55 x 1048 -8 je 2.634x10 m 2-634-448) - for frequency 10 Ez hr 7.65X10 6.63 x 1034 0 = 1.14 x 1016 st v=Ez h 2 us 1.14616

Number of photons in 2.67 mJ sample L 22.67m= 2-67X1635 na h 2067x1053 6-63% 10-34 n = 4.027 x 10 30 photons per second ③ yes, the above wavelength is smaller than 3000m & energy is inversely propostional wavelength to the
answers are wavelength = 2.634E-8 m

Frequency = 1.14E16 s^-1

& 4.027E30 photons per second

And last answer is yes

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