Table 1.
Angle size for different interfaces
| Number of objects | 6 | 8 | 10 | 12 | 15 |
| Angular division | 60˚ | 45˚ | 36˚ | 30˚ | 24˚ |
| Size of detectable range | 55˚ | 40˚ | 31˚ | 25˚ | 19˚ |
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