^^
27.
Night diving is obviously less simple than diving during the day, but when properly organized, it is relatively straightforward. A powerful flashlight will easily light your way and the creatures around you, revealing marine life in its true colors. However, if you cover up your flashlight, you will be surprised at how much light there is underwater. Many creatures use phosphorescence at night, and as you move through the water, you will cause plankton to release tiny pulses of light, leaving beautiful glowing wakes trailing behind you.
28.
There are few people who do not react to music to some degree. The power of music is diverse and people respond in different ways. To some it is mainly an instinctive, exciting sound to which they dance or move their bodies. Other people listen for its message, or take an intellectual approach to its form and construction, appreciating its formal patterns or originality. Above all, however, there can be hardly anyone who is not moved by some kind of music.
Music covers the whole range of emotions: It can make us feel happy or sad, helpless or energetic, and some music is capable of overtaking the mind until it forgets all else. It works on the subconscious, creating or enhancing mood and unlocking deep memories.
29.
Object identification rarely occurs in isolation. Face perception seems to work the same way. Notice that when seen as part of a face presented in Figure A, any bump or line will be sufficient to depict a feature. However, the result may be different when the features are separated from the context as shown in Figure B. The features in Figure B are basically identical with those in Figure A, but, out of context, they are less identifiable. As in Figure C, we actually require a more simplified presentation than in Figure B, to identify facial features unambiguously when presented in isolation. Thus, our understanding of context compensates for lack of detail in the feature identification process.
