Checkpoint: straight lines, shadows and mirrors

Light leaves a lamp and travels through air. What path does it take?

• A straight line
• A curve that follows the room
• A zigzag

Which three things does a dark shadow need?

• Light, an opaque object and a surface
• A dark room, a tall object and a mirror
• A lamp, a mirror and a wall

Light hits a smooth, flat mirror at a shallow slant. How does it leave?

• Straight up
• At the same shallow slant, on the far side
• Back along the path it came by

Light from the top of a tree passes through a pinhole. Where does it land on the screen?

• High up
• In the middle
• Low down

You stand 60 cm in front of a flat mirror. How far behind the mirror is your image?

• 60 cm
• 120 cm
• 30 cm