Question

Red and green light have wavelengths of about 650 nm and 490 nm, respectively. which light has the highest frequency

Answer 1

1. Red, orange, yellow, green, violet.
2. When elections return to their normal, or ground-state position, engery is emitted. When energy is absorbed, electrons within the atoms of substances are excited to higher positions of potential energy.
3. Green light has a higher frequency and a higher energy. (Lower wavelengths mean higher energy and frequency both.)
4. No, a spectroscope could not be used to detect that emission because 285 nm is not in the visible light color spectrum (400-about 700 nm). ((this one I am least sure about, someone else helped with this one))
5. Should be green light because that is 495-570nm.
6. the slit in the spectroscope allows a narrow, collimated beam of light to be admitted.

Answer 2

Answer : Green light.

Explanation :

Wavelength of the red light,
`\lambda=650\ nm=650* 10^(-9)\ m`

Wavelength of the green light,
`\lambda=490\ nm=490* 10^(-9)\ m`

The frequency of the red light is given by :

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

`\\u_r=(3* 10^8\ m/s)/(650* 10^(-9))`

`\\u_r=4.6* 10^(14)\ Hz`

The frequency of the green light is given by :

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

`\\u_g=(3* 10^8\ m/s)/(490* 10^(-9))`

`\\u_g=6.12* 10^(14)\ Hz`

So, green light has highest frequency.