Spectroscopy and Stellar Analysis

The video tutorial explains how to analyze stars by examining their light spectrum. It introduces the concept of using diffraction to split light into wavelengths, similar to a rainbow. The spectrum of the star HD 94028 is analyzed, highlighting the hydrogen alpha line and its significance. The tutorial discusses redshift and blueshift, explaining how they indicate a star's movement relative to Earth. Finally, it demonstrates using MATLAB to calculate the star's velocity and detect potential planets through spectral analysis.

What tool is used to split a beam of light into its individual wavelengths?

• A prism

• A diffraction grating

• A telescope

• A spectrometer

What is the significance of the deep spike in the spectrum of HD 94028?

• It indicates a high intensity of light at that wavelength.

• It suggests the star is very close to Earth.

• It signifies that not much light is radiated at that wavelength.

• It shows the presence of helium in the star.

Why does the hydrogen alpha line in HD 94028's spectrum appear at a longer wavelength?

• The star is rotating rapidly.

• The star is moving away from Earth.

• The star is moving towards Earth.

• The star is stationary.

What is the purpose of using MATLAB in the project task?

• To find the observed wavelength of the hydrogen alpha line

• To simulate the star's lifecycle

• To measure the star's temperature

• To create a 3D model of the star

What can astronomers detect by observing slight oscillations in a star's spectrum over time?

• The presence of planets

• The star's chemical composition

• The star's brightness

• The star's age