cathode_ray_electrostatic_deflection_wrong_direction_00067067
Seed 67067 · intervention 44 · first change 45 · mask start 48 · evidence 68
True A cathode emits a narrow negative electron beam through parallel electrostatic deflection plates. With the upper plate positive and the lower plate negative, the beam bends upward toward the positive plate before reaching the screen.
Counterfactual A cathode emits a narrow negative electron beam through parallel electrostatic deflection plates. With the upper plate positive and the lower plate negative, the beam incorrectly bends downward toward the negative plate before reaching the screen.
Metadata
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"camera": {
"camera_motion": "none",
"in_scene_text": "none; plate charges use vector geometry",
"magnetic_field": "absent",
"native_canvas": [
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"projection": "instrument-like cutaway side view of a cathode-ray tube"
},
"category": "cathode_ray_electrostatic_deflection",
"descriptions": {
"counterfactual": "A cathode emits a narrow negative electron beam through parallel electrostatic deflection plates. With the upper plate positive and the lower plate negative, the beam incorrectly bends downward toward the negative plate before reaching the screen.",
"true": "A cathode emits a narrow negative electron beam through parallel electrostatic deflection plates. With the upper plate positive and the lower plate negative, the beam bends upward toward the positive plate before reaching the screen."
},
"evidence_frame": 68,
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"generation": {
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"ffmpeg_executable": "/home/ec2-user/counterfactual-work/cathode-ray-7b225d5e/runtime/lib/python3.12/site-packages/imageio_ffmpeg/binaries/ffmpeg-linux-x86_64-v7.0.2",
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"timestamp": "2026-10-07T15:36:47.456346+00:00"
},
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"mask_source": "violation",
"seg_idx": [
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"shadow_method": null,
"source": "deterministic_visible_entity_id_pass",
"target_entities": [
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"temporal_rule": "from_first_wrong_deflection"
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"paths": {
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"prompt": "counterfactual_wrong_direction/prompt.txt",
"trajectory": "counterfactual_wrong_direction/trajectory.npz",
"video": "counterfactual_wrong_direction/video.mp4"
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"true": {
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"video": "true/video.mp4"
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},
"phenomenon": "cathode_ray_electrostatic_deflection_wrong_direction",
"phenomenon_data": {
"educational_simplification": "Uniform-field kinematics drive an instrument-like cathode-ray-tube cutaway; the renderer does not claim a particle-in-cell or field-solver simulation.",
"scaling": {
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"beam_speed": 0,
"field_strength": 11,
"plate_geometry": 4,
"tube_palette": 1
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"contract_version": "CGC-v1",
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"scene_params": {
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"plate_length_px": 546.5915254032016,
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"source_delay_frame": 18
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"scoring_contract": {
"binary_questions": [
"Does the negative electron beam bend toward the positively charged deflection plate?",
"Does the negative electron beam incorrectly bend toward the negatively charged plate?"
],
"scoring": {
"correct_if_true": [
"electron beam bends toward the positive plate"
],
"violation_if_true": [
"electron beam bends toward the negative plate"
]
},
"violation_types": [
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},
"semantic_facts": {
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"maximum_centerline_deflection_px": 105.71515562531388,
"true_target_plate": "positive_upper_plate"
},
"semantic_ground_truth": {
"beam_charge": "negative",
"counterfactual_force_direction": "downward",
"domain": "cathode_ray_electrostatic_deflection",
"electric_field_strength_relative": 1.110452394654904,
"lower_plate": "negative",
"single_error": "electrostatic force direction on the electron beam is reversed",
"target": "electron_beam_in_field",
"true_force_direction": "upward",
"upper_plate": "positive"
}
},
"render": {
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"fps": 24,
"n_frames": 120,
"res": [
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"solver": "uniform-electric-field analytical kinematics",
"solver_substeps_per_frame": 0,
"source_dt_s": 0.041666666666666664,
"source_seconds_per_video_second": 1.0
},
"task_id": "cathode_ray_electrostatic_deflection_wrong_direction_00067067",
"violation_type": "wrong_direction"
}