Question

A metal foil has a threshold frequency of 5.45 x 10^14 HzWhich of the colors of visible light have enough energy to eject electrons from this metal. red orange yellow green blue violet indigo 1 following

Answer 1

Green light

Step-by-step explanation:

To solve the problem, we need to evaluate which wavelength of light corresponds to the threshold frequency of the metal

The relationship between frequency and wavelength is:

`\lambda=(c)/(f)`

where

`c=3\cdot 10^8 m/s` is the speed of light

`f=5.45\cdot 10^(14)Hz` is the frequency

Substituting into the formula,

`\lambda=(3\cdot 10^8 m/s)/(5.45\cdot 10^(14) Hz)=5.50\cdot 10^(-7)m=550 nm`

And wavelength of 550 nm corresponds to green light.