
Room setup |

Optical bench (light bulb closest to window) |

Group bench riders together at end holding
bulb, arrow object, lens, screen |

Detail of bulb, arrow object, lens |

Note how all objects are at the same height! |

Rider for arrow object is aligned with 5 cm mark. . . |

. . . or aligned with 120 cm mark |

Place 800-series lens in bench |

Screen has index card side facing lens |

Use a variac to control bulb brightness |

Place "virtual image detector" on lab bench |

Place a small mounted lens (marked with "A") on the lab bench |

Place boxes of extra lenses up front |