Answer:
λ = 5.4196 10⁻⁷m, λ = 541.96 nm this is green ligh
Explanation:
The photoelectric effect was explained by Eintein assuming that the light was made up of particles called photons and these collided with the electrons taking them out of the material.
K = h f -Ф
where K is the kinetic energy of the ejected electrons, hf is the energy of the light quanta and fi is the work function of the material.
The speed of light is related to wavelength and frequency
c = λ / f
f = c /λ
we substitute
K = h c / λ - Φ
for the case that they ask us the kinetic energy of the electons is zero (K = 0)
h c / λ = Ф
λ = h c / Ф
we calculate
λ = 6.63 10⁻³⁴ 3 10⁸ / 3.67 10⁻¹⁸
λ = 5.4196 10⁻⁷m
let's take nm
lam = 541.96 nm
this is green light
Answer:Magnetic fields are invisible, at least usually. But scientists from NASA's Space Sciences Laboratory have made them visible as "animated photographs," using sound-controlled CGI and 3D compositing.
Explanation:
<h3>
Answer:</h3>
6.38 seconds
<h3>
Explanation:</h3>
We are given;
- The force exerted by the runner as 234 N
- Power used = 1100 W
- Distance as 30.0 m
We are required to determine the time taken to run the distance;
- We know that power is the rate of work done
That is;
Power = work done ÷ time
But, work done = Force × distance
Therefore;
Work done = 234 N × 30 m
= 7020 Joules
Therefore, from the formula, Power = work done ÷ time
Time = Work done ÷ power
Thus;
Time = 7020 J ÷ 1100 W
= 6.38 seconds
Hence, the time taken is 6.38 seconds
B will have the greater force
Fc=MV2 /R=Fm
The A particle has less centipetal force and larger radius so larger curve
