Answer:
minimum number of photon is 4.05 ×
Explanation:
given data
energy = 50 keV = 50 × eV = 50 × × 1.602× J
thickness = 10^-3
contrast = 1%
to find out
number of incident photons
solution
we know here equation that is
E = n × h × ν .......................1
put here all these value
50 × = n × 6.6× × c/ 1×
50 × × 1.602× = n × 6.6× ×( 3 × / 1× )
solve it and find n
n = 4.05 ×
so here minimum number of photon is 4.05 ×
Na + Cl
An ionic bond is made between a metal and a non-metal
Answer:
D
Explanation:
I hope you get a good grade!
Measuring spoons are used when measuring less than 1/4 cup
Answer:
See below
Explanation:
<u>I will use 3 x 10^8 m/s for speed or wave</u>
speed = wavelength * frequency
3 x 10^8 = w * 7.34 x 10^2 <====== are you sure this isn't KILO Hz ?
w = <u>408719. 3 meters </u>