WAEC Physics 2025 Theory — Question 6

Model answer

Laser light: consists of a single wavelength/colour (monochromatic); the light waves are in phase with each other (coherent); it is directional, travelling in a narrow beam; it is very intense and has a high concentration of energy. White light: consists of a broad spectrum of wavelengths (polychromatic); the waves are not in phase (incoherent); it is non-directional and scatters in various directions; it is less intense than laser light.