Answer the following question given this paragraph: 

If you look at a star through a prism, you will see a spectrum . The spectrum is the range of colors seen in a rainbow. The spectrum has specific dark bands where elements in the star have absorbed light of certain energies. An astronomer can use these lines to determine which elements are in a distant star. In fact, the element helium was first discovered in our Sun, not on Earth. This was done by analyzing the absorption lines in the spectrum of the sun.


Q: What will you see if you look at a star through a prism?

 Choices:

- kaleidoscope

- rainbow

- spots

- spectrum

A:
spectrum
