Causes objects to fluoresce Can be detected by photographic plating The Spectrometer and the function of its parts Collimator: To ensure that the light which comes out (onto the diffraction grating) is a parallel beam. Astronomical Telescope: The telescope is used to view an image of the slit. Cross-Threads: Used to centre the slit Mandatory Experiment: To measure the wavelength of Light Questions to make you think Can you think of a way to find out if any two the same colour when they look at the same people ‘see’ image? as easy as you think! It’s not Why is blue associated with cold and red with hot when we now know from the electromagnetic spectrum that blue (and UV) is more energetic than red (and IR)? Given that Richard of is now known by millions of Science students worldwide, I submit that York’s name in vain after all. he didn’t die Leaving Cert Physics Syllabus Content Depth of Treatment Activities STS 1. Diffraction and Use of diffraction grating Suitable method of Interference colours interference formula: n = d Sin demonstrating the wave Petrol film, soap nature of light. bubbles. Derivation of formula Appropriate calculations. 2. Light as a transverse Polarisation Demonstration of Stress polarisation. wave motion polarisation using polaroids Polaroid sungalsses. other method. or 3. Dispersion Dispersion by a prism and Demonstration. Rainbows, polished a diffraction grating. gemstones. Recombination by a prism. Colours seen on surfaces of compact discs.
Causes objects to fluoresce Can be detected by photographic plating The Spectrometer and the function of its parts Collimator: To ensure that the light which comes out (onto the diffraction grating) is a parallel beam. Astronomical Telescope: The telescope is used to view an image of the slit. Cross-Threads: Used to centre the slit Mandatory Experiment: To measure the wavelength of Light Questions to make you think Can you think of a way to find out if any two people ‘see’ the same colour when they look at the same image? It’s not as easy as you think! Why is blue associated with cold and red with hot when we now know from the electromagnetic spectrum that blue (and UV) is more energetic than red (and IR)? Given that Richard of York’s name is now known by millions of Science students worldwide, I submit that he didn’t die in vain after all. Leaving Cert Physics Syllabus Content Depth of Treatment Activities STS 1. Diffraction and interference Use of diffraction grating formula: n = d Sin Derivation of formula Suitable method of demonstrating the wave nature of light. Appropriate calculations. Interference colours Petrol film, soap bubbles. 2. Light as a transverse wave motion Polarisation Demonstration of polarisation using polaroids or other method. Stress polarisation. Polaroid sungalsses. 3. Dispersion Dispersion by a prism and a diffraction grating. Recombination by a prism. Demonstration. Rainbows, polished gemstones. Colours seen on surfaces of compact discs.
18-light-waves.docx