Referring to a spectrum or range:
* The spectral analysis revealed the presence of multiple elements in the sample.
* The artist used a wide spectral range of colors in their painting, creating a vibrant and dynamic piece.
* The scientist studied the spectral distribution of light emitted by the star.
Referring to ghosts or spirits:
* The old house was rumored to be haunted by spectral figures.
* The story told of a spectral apparition that appeared at midnight.
* The protagonist encountered a spectral image of their deceased loved one.
Other uses:
* The spectral lines of hydrogen were clearly visible in the telescope's view.
* The mathematician developed a new method for analyzing spectral data.
* The musician's voice had a spectral quality that resonated with the audience.
Remember to consider the context and intended meaning when using "spectral" to ensure your sentence is clear and conveys the right information.