# Redshift Calculator

Use the Redshift Calculator to quickly determine the redshift parameter. To obtain an accurate redshift parameter value as well as a full explanation, simply enter the emitted light wavelength and observed light wavelength information and press the calculate button.

### What is meant by Redshift?

The spectral lines of electromagnetic radiation emitted by some stars or galaxies are shifted towards longer wavelengths, a phenomenon known as redshift (or lower frequencies).

The redshift can be caused by a variety of factors, including:

- When a light source moves away from an observer, the relativistic Doppler effect occurs.
- The faster universes appear to travel away from us, the faster the universe appears to expand.
- Light loses energy by resolving the gravity of the star, i.e., the wavelength of the light grows.

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### Redshift Formula

The redshift is defined in astronomy by the dimensionless quantity z. The z parameter can be estimated in two ways using our redshift calculator:

**z = (λo - λe) / λe or z = (fe - fo) / fo**

- Here, z is the redshift parameter
- λe and fe are the wavelength and frequency of emitted light respectively
- λo and fo are the wavelength and frequency of observed light, respectively.

### How do you Calculate Redshift using Calculator?

You'll find straightforward instructions for calculating the redshift parameter.

- Get the wavelength of the light that was emitted and the wavelength of the light that was detected.
- Press the calculate button
- To determine the redshift parameter, divide the value by the wavelength of the emitted light.

### Redshift Examples

**Question 1:**Find the redshift parameter if the wavelengths of the emitted and observed wavelengths are 160 nm and 130 nm, respectively.

**Solution:**

Consider the problem, we have

Wavelengh of Emitted light = 160 nm

Wavelengh of Observed light = 130 nm

The formula for finding the redshift parameter,**z = (λo - λe) / λe or z = (fe - fo) / fo**

Frequency of Emitted light = 1873.7 teraHertz

Frequency of Observed light = 2306.0923076923077 teraHertz

z = -0.1875

Therefore,the redshift parameter is **z = -0.1875**

### FAQs on Redshift Calculator

**1. What exactly is a redshift?**

It is defined as stretching the wavelength of light, which causes it to shift towards the red section of the spectrum.

**2. What are the factors causes redshift?**

The main factors are Doppler effect, universal expansion and gravitational effects.

**3. What is the redshift and blueshift?**

The letters z stand for redshift and blueshift. A positive z indicates a redshift, while a negative z indicates a blueshift.

**4. Is redshift getting closer or further away?**

In fact, not only is it redshifted, but galaxies further away are redshifted more than galaxies closer to us.