Ideas in this flowchart

• Effect of Squeezing Laser Beam
• Initial Observation
• Shine Laser at Screen
• Bright Spot on Screen
• Introducing Barriers
• Barriers with Large Distance
• Spot Unchanged
• Reducing Distance Between Barriers
• Expected Outcome
• Spot Becomes Thinner
• Spot Completely Blocked
• Actual Outcome
• Diffraction Patterns
• Alternating Bright and Dark Stripes
• Zero-th Order Bright Fringe
• Probability Distribution
• Single Photon Observation
• Pattern Spreads Out
• Wider Central Bright Fringe