# Period of a monocromatic light?

• riddlingminion
In summary, the period of a monochromatic light with a wavelength of 660nm can be calculated using the equation T=1/f, where f is the frequency. The equation v=fλ can be used to calculate the frequency, then the formula for time period can be applied. The greek symbol λ stands for wavelength.
riddlingminion

## Homework Statement

What is the period of a monochromatic light with a wavelength of 660nm?
f=660nm

## Homework Equations

T= 1/f (I think?)

## The Attempt at a Solution

T = 1/660nm
The period of this monochromatic light is 0.00152 waves/nm.
Firstly, I don't know for sure that the variable T is equal to period, as this is review of last years stuff I've forgotten. Also, just to ask a quick question in this thread for my next question so I don't have to post it here, in the formula v = f& (the & is actually a weird greek symbol), what does the & stand for?

T=1/f is correct, but f here stands for frequency. In your question, the wavelength is 660nm, not the frequency. First, you need to use the equation $v=f\lambda$ to calculate the frequency, then use the formula for time period. The "weird greek symbol" is the greek letter lambda and stands for wavelength.

Thanks a lot for the help.

## 1. What is the period of a monocromatic light?

The period of a monocromatic light refers to the time it takes for one full cycle of the light's oscillation. This is measured in seconds and is related to the light's frequency.

## 2. How is the period of a monocromatic light related to its frequency?

The period and frequency of a light wave are inversely related. This means that as the frequency increases, the period decreases, and vice versa. This can be mathematically represented as T = 1/f, where T is the period and f is the frequency.

## 3. Can the period of a monocromatic light change?

The period of a monocromatic light is determined by its source and cannot be changed. However, the light's frequency and wavelength can change when it passes through different mediums, such as air or water.

## 4. How is the period of a monocromatic light measured?

The period of a monocromatic light can be measured using specialized equipment, such as a spectrometer or an oscilloscope. These devices can detect the frequency of the light and calculate the period using the equation T = 1/f.

## 5. What is the significance of the period of a monocromatic light?

The period of a monocromatic light is important in understanding the behavior of light waves and their interactions with matter. It also plays a crucial role in applications such as telecommunications, astronomy, and spectroscopy.

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