Core Practical 8: Investigating Diffraction Gratings Aim of the Experiment To find the wavelength of light using a diffraction grating Variables Independent variable = Distance between maxima, h De...
The Diffraction Grating Equation A diffraction grating is a plate on which there is a very large number of parallel, identical, close-spaced slits When monochromatic light is incident on a grating,...
Diffraction Diffraction is the spreading out of waves when they pass an obstruction Diffraction through a gap This obstruction is typically a narrow gap (a slit, or aperture) Diffraction is usually...
Plane Polarisation Transverse waves can oscillate in any plane perpendicular to the direction of motion (and energy transfer) of the wave Such waves are said to be unpolarised Polarisation occurs w...
Magnification Magnification as a Ratio of Heights Magnification means how much larger the image is than the object This is the ratio of the image/object height Where: m = magnification hi = image ...
The Lens Equation This equation can be applied to all thin converging and diverging lenses The equation relates the focal length of the lens to the distances from the lens to the image and the obje...
Real & Virtual Images Real Images Are formed when light rays from a point on an object pass through another point in space The light rays are really there Can be formed on a screen Are seen in ...
Thin Lenses in Combination When multiple lenses are used in series (one after the other) this is called a compound lens To find the total power of a compound lens, find the sum of the powers of the...
Power of a Lens The power of a lens is a measure of its ability to refract light The more refraction a lens causes, the higher its power The power of a lens measures how strongly it focuses the lig...
