Answer:
1.11 x 10⁻¹⁹ J
Step-by-step explanation:
To calculate the energy of the light, you need to use one of Einstein's equations:
E = hf
In this equation,
-----> E = energy (J)
-----> h = Planck's Constant (6.626 x 10⁻³⁴ J·s)
-----> f = frequency (Hz)
You can plug the constant and given value into the equation and solve for "E". The final answer should have 3 sig figs like the given value.
E = hf <----- Einstein's equation
E = (6.626 x 10⁻³⁴ J·s)(1.68 x 10¹⁴ Hz) <----- Insert values
E = 1.11 x 10⁻¹⁹ J <----- Multiply