Question

(a) A laser produces a beam of monochromatic light. State what is meant by the term monochromatic. containing / using only 1 color [1] (b) A wave, in air, is incident on a glass block. Fig. 7.1 shows the wavefronts at the air-glass boundary. The arrow shows the direction of travel of the wavefronts. direction of travel of wavefronts air glass Fig. 7.1 The wave undergoes reflection and refraction at the air-glass boundary. On Fig. 7.1 draw: (i) the wavefronts of the reflected wave [3] (ii) the wavefronts of the refracted wave. [3] A transverse wave is produced in a long, horizontal rope. The rope is much longer than the wavelength of the wave. In the space below, sketch a diagram to show the appearance of the rope as the wave passes along it. Label two important features of the wave. wavelength crest

          (a) A laser produces a beam of monochromatic light. State what is meant by the term monochromatic. containing / using only 1 color [1] (b) A wave, in air, is incident on a glass block. Fig. 7.1 shows the wavefronts at the air-glass boundary. The arrow shows the direction of travel of the wavefronts. direction of travel of wavefronts air glass Fig. 7.1 The wave undergoes reflection and refraction at the air-glass boundary. On Fig. 7.1 draw: (i) the wavefronts of the reflected wave [3] (ii) the wavefronts of the refracted wave. [3] A transverse wave is produced in a long, horizontal rope. The rope is much longer than the wavelength of the wave. In the space below, sketch a diagram to show the appearance of the rope as the wave passes along it. Label two important features of the wave. wavelength crest

$(a) A laser produces a beam of monochromatic light. State what is meant by the term monochromatic. containing / using only 1 color [1] (b) A wave, in air, is incident on a glass block. Fig. 7.1 shows the wavefronts at the air-glass boundary. The arrow shows the direction of travel of the wavefronts. direction of travel of wavefronts air glass Fig. 7.1 The wave undergoes reflection and refraction at the air-glass boundary. On Fig. 7.1 draw: (i) the wavefronts of the reflected wave [3] (ii) the wavefronts of the refracted wave. [3] A transverse wave is produced in a long, horizontal rope. The rope is much longer than the wavelength of the wave. In the space below, sketch a diagram to show the appearance of the rope as the wave passes along it. Label two important features of the wave. wavelength crest$

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