This question is about electromagnetic waves and the Universe.
State one similarity and one difference between Gamma rays and Infrared (IR) radiation.
Similarity: _________________________________
Difference: _________________________________
The following graph shows how the absorption of Infrared (IR) radiation changes with the thickness of water.
What percentage of Infrared radiation is absorbed by 2 mm2\text{ mm}2 mm of water?
Percentage absorbed = ________ %
Calculate the percentage of Infrared radiation passing through 2 mm2\text{ mm}2 mm of water.
Percentage passing through = ________ %
Use words from the following list to complete the sentences about stars and the Universe. Each word may be used once, more than once, or not at all.
Big Bang** | Contracting | CMBR | Expanding | Red giant | Red shift | **White dwarf
- The __________________ is electromagnetic radiation from the early stages of the universe that is detected from all directions in space.
- Near the end of its life cycle, a star of similar mass to the Sun will expand and cool to become a __________________.
- Light from distant galaxies is shifted towards longer wavelengths, showing that they are moving away from us. This observation is called __________________.