Do All Light Bulbs Produce The Same Light?

Intended Learning Outcomes

The students will be able to:

  • demonstrate skills in the design of experiments and the use of precision instruments
  • gain experience in collecting and analyzing experimental data with uncertainties
  • demonstrate an understanding of the processes of thermal radiation and atomic emission and fluorescence.

Teaching Rationales

  • Students will investigate the spectra of different light sources, in particular traditional incandescent light bulbs and mini-fluorescent "energy-efficient" light bulbs.
  • Students will distinguish thermal radiation, atomic emission and fluorescence as sources of electromagnetic radiation in general, and light in particular, and the spectra characteristic of each process.

Learning Areas, Strands, Achievement Objectives

7 - 8 Science

Nature of Science
Investigating in science

  • Students will develop and carry out investigations that extend their science knowledge, including developing their understanding of the relationship between investigations and scientific theories and models.

Physical World
Physical inquiry and physical concepts

  • Students will investigate physical phenomena (in the areas of mechanics, electricity, electromagnetism, light and waves, and atomic and nuclear physics) and produce qualitative and quantitative explanations for a variety of complex situations.
  • Students will analyse and evaluate data to deduce complex trends and relationships in physical phenomena.

Using physics

  • Students will use physics ideas to explain a technological, biological or astronomical application of physics and discuss related issues.
7

Unit Standards Level 2

  • 6382 Demonstrate knowledge of waves
  • 6385 Carry out a practical investigation of a physics-based application with supervision

Achievement Standards Level 2

  • 90252 Take measurements of physical quantities and analyse data graphically to determine a relationship
8

Unit Standards Level 3

  • 6391 Demonstrate knowledge of, and determine unknowns for, wave systems
  • 6394 Carry out a practical investigation of a physics-based application with guidance
  • 6396 Describe and discuss models of atomic systems

Achievement Standards Level 3

  • 90520 Demonstrate understanding of wave systems
  • 90522 Demonstrate understanding of atoms, photons and nuclei
  • 90774 Carry out a practical physics investigation with guidance, that leads to a mathematical relationship

Activity-specific Achievement Objectives

7 - 8 Science

Nature of Science
Investigating in science

  • Students will develop and carry out investigations that extend their scientific knowledge of the nature of light and the processes by which light is emitted from different sources or types of bulbs.

Physical World
Physical inquiry and physical concepts

  • Students will investigate the physical phenomena of light, light emitting processes and spectra.
  • Students will produce qualitative and quantitative data to explain the spectra emitted by different types of light bulb.

Using physics

  • Students will use physics ideas about light to explain the spectra emmited by different types of light bulbs.