All flashcards
Flashcard 1: Identify the correct model for seeing a tree at night using headlights.
Answer: Headlights → tree → eye. Car lights illuminate the tree, which reflects light to your eyes.
Flashcard 2: What should a model include to show that a mirror reflects light into your eye?
Answer: An incoming ray to the mirror and a reflected ray to the eye. Shows light hitting mirror and bouncing to observer's eye.
Flashcard 3: Which option correctly models seeing a pencil on a desk: A) eye→pencil B) lamp→pencil→eye?
Answer: B) lamp → pencil → eye. Light must travel from source to object to eye for vision.
Flashcard 4: What is the best model for scattered reflection from paper compared with a mirror?
Answer: Many reflected rays go in different directions from the paper. Rough surfaces scatter light in multiple directions, unlike smooth mirrors.
Flashcard 5: Identify what must be drawn between object and eye to model seeing: straight arrows or curved arrows?
Answer: Straight arrows (light rays travel in straight lines). Light always travels in straight paths between points.
Flashcard 6: Identify the missing step: Sun → eye (you are looking at the Moon). What step is missing?
Answer: Sun → Moon → eye. The Moon reflects sunlight to be visible from Earth.
Flashcard 7: What happens in a model when an object blocks light from reaching your eye?
Answer: A shadow forms because light cannot reach the eye from that direction. Objects block light paths, creating dark areas where light can't reach.
Flashcard 8: Which object in a model is usually the light source: flashlight or soccer ball?
Answer: flashlight. Flashlights emit light; balls only reflect it.
Flashcard 9: What is the main reason a shiny object often looks brighter than a dull object?
Answer: It reflects more light toward your eyes. Shiny surfaces reflect light more efficiently than dull ones.
Flashcard 10: What is the term for a beam of light drawn as a straight line in a model?
Answer: a ray. Rays represent light paths as straight lines in diagrams.
Flashcard 11: What is reflection in a light model?
Answer: Reflection is light bouncing off a surface. Light changes direction when it hits a surface and returns.
Flashcard 12: What is the correct light path you must model to show seeing an object?
Answer: Light source object eye. Light must travel from source to object, then reflect to your eye.
Flashcard 13: Identify the missing part: Light source object .
Answer: eye. Complete path: source → object → eye for vision.
Flashcard 14: Which choice best describes what happens to light when it hits a mirror?
Answer: Most light reflects in a regular, predictable direction. Smooth surfaces reflect light uniformly in one direction.
Flashcard 15: Identify the correct arrow direction for a model of seeing a book under a lamp.
Answer: Lamp book, then book eye. Shows light path from source to object, then object to observer.
Flashcard 16: Which option correctly completes the model: Light travels in lines.
Answer: straight. Light rays don't bend or curve through air.
Flashcard 17: What is the role of the eye in a reflection model?
Answer: It receives the reflected light. Eyes detect light to form images of objects.
Flashcard 18: What is the role of the object in a reflection-to-eye model?
Answer: It reflects light toward the eye. Objects bounce light from sources toward observers.
Flashcard 19: What is the role of a light source in a reflection-to-eye model?
Answer: It provides the light that later reflects to the eye. Without a light source, there's no light to reflect off objects.
Flashcard 20: Which statement correctly models why you can see a non-glowing object?
Answer: You see it when reflected light enters your eye. Objects don't emit light; they reflect light from other sources.
Flashcard 21: Which choice best describes reflection from rough paper in a light model?
Answer: Light reflects in many directions (diffuse reflection). Rough surfaces scatter light in multiple directions.
Flashcard 22: Identify the surface that produces diffuse reflection in most cases: mirror or wall?
Answer: wall. Rough surfaces scatter light diffusely, unlike smooth mirrors.
Flashcard 23: Identify the surface that produces regular reflection in most cases: mirror or carpet?
Answer: mirror. Smooth surfaces produce regular, predictable reflection.
Flashcard 24: What must happen for you to see an object in a dark room with no light source?
Answer: You cannot see it because no light reflects into your eye. Without light to reflect, objects remain invisible.
Flashcard 25: Which option is correct: Your eyes send out light to see, or your eyes receive light to see?
Answer: Your eyes receive light to see. Eyes are detectors, not light sources.
Flashcard 26: Find and correct the model error: Eye object light source.
Answer: Correct: Light source object eye. Arrows must show light traveling from source to eye via object.
Flashcard 27: Identify the best model for seeing the Moon from Earth at night.
Answer: Sun Moon, then Moon eye. Moon reflects sunlight to Earth observers.
Flashcard 28: What should a correct model show about light traveling through air?
Answer: Light travels in straight lines. Light rays don't bend or curve when moving through uniform air.
Flashcard 29: Which option is a light source in a model: Moon, mirror, flashlight, book?
Answer: flashlight. Only flashlight produces its own light; others reflect light.
Flashcard 30: Which option is a non-light source in a model: candle, Sun, mirror, lamp?
Answer: mirror. Mirror reflects light but doesn't produce it like the other options.