Podcast
Questions and Answers
What is the primary purpose of magenta, cyan, and yellow in a printer?
What is the primary purpose of magenta, cyan, and yellow in a printer?
- To combine and produce color prints (correct)
- To absorb all colors and produce white
- To create monochrome prints
- To create grayscale images
Which of the following statements is true regarding the color black?
Which of the following statements is true regarding the color black?
- It absorbs all colors equally
- It reflects only green light
- It reflects all light
- It reflects no light (correct)
What type of mirror is defined as bending inwards and can magnify objects?
What type of mirror is defined as bending inwards and can magnify objects?
- Convex mirror
- Flat mirror
- Plane mirror
- Concave mirror (correct)
What happens when you shine white light through a transparent filter?
What happens when you shine white light through a transparent filter?
Why are fluorescent and LED bulbs preferred over incandescent bulbs?
Why are fluorescent and LED bulbs preferred over incandescent bulbs?
What distinguishes transparent, translucent, and opaque materials?
What distinguishes transparent, translucent, and opaque materials?
What occurs when complementary colors are mixed together?
What occurs when complementary colors are mixed together?
Which of the following is a characteristic of a plane mirror?
Which of the following is a characteristic of a plane mirror?
What type of image is produced by a concave mirror when an object is placed close to it?
What type of image is produced by a concave mirror when an object is placed close to it?
What does the acronym SALT stand for in relation to image formation?
What does the acronym SALT stand for in relation to image formation?
Which of the following mirrors is classified as a diverging mirror?
Which of the following mirrors is classified as a diverging mirror?
What characteristic describes the reflection produced by a freshly waxed car?
What characteristic describes the reflection produced by a freshly waxed car?
When using the Law of Reflection, what is the relationship between the angle of incidence and the angle of reflection?
When using the Law of Reflection, what is the relationship between the angle of incidence and the angle of reflection?
Which of the following describes the image characteristics produced by a plane mirror?
Which of the following describes the image characteristics produced by a plane mirror?
Which type of mirror is commonly used for shaving?
Which type of mirror is commonly used for shaving?
What type of image is formed by a diverging mirror?
What type of image is formed by a diverging mirror?
What is the primary characteristic of luminous objects?
What is the primary characteristic of luminous objects?
Which two primary colors combine to produce yellow light?
Which two primary colors combine to produce yellow light?
What is True Colour?
What is True Colour?
Which type of light is produced by a chemical reaction?
Which type of light is produced by a chemical reaction?
Combining which three secondary colors results in the production of white light?
Combining which three secondary colors results in the production of white light?
Which of the following represents a non-luminous object?
Which of the following represents a non-luminous object?
What happens when primary colors of light are mixed?
What happens when primary colors of light are mixed?
What distinguishes fluorescent light from incandescent light?
What distinguishes fluorescent light from incandescent light?
Flashcards
Luminous Objects
Luminous Objects
Objects that produce their own light.
Non-luminous Objects
Non-luminous Objects
Objects that do not produce their own light, but reflect it.
Electromagnetic Spectrum Types
Electromagnetic Spectrum Types
Radio waves, microwaves, infrared, visible light, UV light, X-rays, and gamma rays.
Visible Light Colors
Visible Light Colors
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Primary Colors (Light)
Primary Colors (Light)
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Secondary Colors (Light)
Secondary Colors (Light)
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True Color
True Color
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Combining Primary Light Colors
Combining Primary Light Colors
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Light-sensitive cells in eye
Light-sensitive cells in eye
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Transparent material
Transparent material
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Translucent material
Translucent material
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Opaque material
Opaque material
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Plane mirror
Plane mirror
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Converging mirror
Converging mirror
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Complementary colors
Complementary colors
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Switching to efficient lights
Switching to efficient lights
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Law of Reflection
Law of Reflection
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Plane Mirror Image Size
Plane Mirror Image Size
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Concave Mirror Image
Concave Mirror Image
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SALT
SALT
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Angle of Incidence
Angle of Incidence
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Regular Reflection
Regular Reflection
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Uses of Converging Mirrors
Uses of Converging Mirrors
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Study Notes
Electromagnetic Spectrum
- Includes radio waves, microwaves, infrared, visible light, UV light, X-rays, and gamma rays.
- Visible light spectrum is ROY G. BIV (red, orange, yellow, green, blue, indigo, violet).
Luminous vs. Non-luminous Objects
- Luminous objects generate their own light (e.g., sun, light bulb, fireflies).
- Non-luminous objects do not generate their own light but reflect light from a source (e.g., moon, a book).
Types of Light
- Incandescent: Copper coil heats up to produce light (not efficient).
- Fluorescent: Argon gas and mercury in a bulb react, creating light (more efficient but contains toxic mercury).
- LED (Light-Emitting Diodes): Very efficient and produce little heat.
- Chemiluminescence: Chemical reactions produce light.
- Bioluminescence: Organisms generate their own light (e.g., fireflies, jellyfish).
Primary Colors of Light
- Red, green, and blue combine to produce white light.
Secondary Colors of Light
- Red + Blue = Magenta
- Red + Green = Yellow
- Blue + Green = Cyan
True Color
- The color of an object as seen under white light (no filtered light).
Combining Primary Colors of Light
- Combining primary colors produces white light.
Combining Secondary Colors of Light
- Combining secondary colors produces white light (as secondary colors are combinations of primary colors).
Transparent, Translucent, Opaque
- Transparent: Light passes completely through.
- Translucent: Some light passes through, but it is scattered.
- Opaque: No light passes through.
Complementary Colors
- Complementary colors (when combined) produce white light.
Plane Mirrors
- Flat mirror
- Same size image
- Upright
- Equal distance from object but reversed
- Virtual image
Converging Mirrors
- Concave mirror
- Small object far from mirror=magnified image
- Small object close to mirror=upright image
- Real image when object far from mirror, virtual when close
- Image inverted when far, upright when close
Diverging Mirrors
- Convex mirror
- Smaller image than the object
- Upright
- Virtual image
- Behind the mirror
Angle of Reflection
- The angle between the reflected ray and the normal equals the angle of incidence.
Image Size in a Plane Mirror
- Same size as the object.
Image Type in a Plane Mirror
- Virtual image (behind the mirror).
SALT (Image Characteristics)
- Size
- Attitude, (orientation of the image)
- Location (where the image is located relative to the mirror)
- Type (real or virtual)
Uses of Converging Mirrors
- Shaving mirrors, head mirrors, ophthalmoscopes, astronomical telescopes, headlights, solar furnaces.
Uses of Diverging Mirrors
- Side-view mirrors on cars, security mirrors in stores.
Light Bulb Efficiency
- Governments promote fluorescent and LED light bulbs over incandescent bulbs due to increased efficiency and longer lifespan.
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