Question

2 Points

What is the frequency of an electromagnetic wave with energy of 5.0 x 10-20
J?
O
A. 7.55 x 1013 Hz
B. 5.22 x 105 Hz
C. 3.98 x 10-6 Hz
D. 1.67 * 10-28 Hz
O
O
SUBMIT

Answer 1

V = 7.55 x 10∧13 Hz (A)

Step-by-step explanation:

E= hv

E is energy

h is constant (6.626 x 10∧-34)

v= frequency

V = E/h

V = (5 x 10 ∧ -20) / ( 6. 626 x 10∧-34) = (5/6.626 ) x 10∧ -20-(-34)

V = 0.75460307878 X 10∧-20+34 = 0.75460307878 x 10∧14

V = 7.55 x 10∧13 Hz (A)

Answer 2

The frequency is 7.55 *10^13 Hz (option A)

Step-by-step explanation:

Step 1: Data given

Energy = 5.0 * 10^-20 J

Planck's constant = 6.626 * 10^-34 J*s

Step 2: Calculate the frequency

E = h *f

⇒ Energy = 5.0 * 10^-20 J

⇒ h = Planck's constant = 6.626 * 10^-34 J*s

⇒ f = The frequency (in Hz) = TO BE DETERMINED

f = E/h

f= 5.0 * 10^-20 J / 6.626 * 10^-34 J*s

f = 7.55 *10^13 Hz

The frequency is 7.55 *10^13 Hz (option A)