- White light is part of the electromagnetic spectrum – a family of radiation waves with different wavelengths.
a) List all of the members of the electromagnetic spectrum, from shortest wavelength to longest wavelength.
b) What property do all of the members have in common?
c) White light can be split into different colours.
i. Which of the colours blue, green and red are seen at each position X, Y and Z?
ii. The same device can be used to analyse light from a star. What information can be obtained from this analysis?
- Light from a star is split into a line spectrum, of different colours.
a) What is the name of a glass shape that is used to split light into different colours?
b) The line spectrum from the star is shown, along with the line spectra of the elements calcium, helium, hydrogen and sodium.
Use this info to identify the elements present in the star.
