number of photons = .......................................................... [3] 14 When parallel waves of wavelength pass through a gap of width b as shown in Fig. λ 5.1, they spread out by diffraction. The intensity is a maximum in the forward direction, dropping away to zero intensity at an angle on each side. θ Fig. 5.1 (a) Which one of the following changes to the wavelength and the gap spacing b λ would result in an increase of the angle ? θ Put a tick (✓) in the correct box. doubling and halving b λ halving and doubling b λ doubling and doubling b λ halving and halving b λ [1]
number of photons = .......................................................... [3] 14 When parallel waves of wavelength λ pass through a gap of width b as shown in Fig. 5.1, they spread out by diffraction. The intensity is a maximum in the forward direction, dropping away to zero intensity at an angle θ on each side. Fig. 5.1 (a) Which one of the following changes to the wavelength λ and the gap spacing b would result in an increase of the angle θ ? Put a tick (✓) in the correct box. doubling λ and halving b halving λ and doubling b doubling λ and doubling b halving λ and halving b [1]
GCE%20A_AS%20Level%20Physics%20B%20Topic%20Test%20-%20Understanding%20Processes.docx