The frequency of the monochromatic light produced by a laser is 5.0×1014 Hz5.0 \times 10^{14} \text{ Hz}5.0×1014 Hz.
A ray of light from the laser passes from a vacuum, where the speed of light is 3.0×108 m/s3.0 \times 10^8 \text{ m/s}3.0×108 m/s, into a block of crown glass.
State
(i) what is meant by monochromatic,
(ii) the frequency of light from the laser inside the glass block.
The speed of light in the glass block is 1.875×108 m/s1.875 \times 10^8 \text{ m/s}1.875×108 m/s.
Calculate
(i) the refractive index of the glass from which the block is made,
(ii) the wavelength of light from the laser inside the glass block.
216 exam-style questions on CIE IGCSE Physics 3.2 Light, covering 3.2.1a Reflection of light, 3.2.1b Images in a plane mirror, 3.2.2 Refraction of light, 3.2.2a Refraction of light, 3.2.2b Total internal reflection, 3.2.2c Refractive index and critical angle, 3.2.2d Optical fibres, 3.2.3a Converging and diverging lenses, 3.2.3b Ray diagrams and the nature of images, 3.2.3c Virtual images and the magnifying glass, 3.2.3d Correcting long-sightedness and short-sightedness, and 3.2.4 Dispersion of light. Each one has a worked solution and a mark scheme showing where the marks go.