Chap16 Light

Fundamentals of Light Chapter 16

Fundamentals of Light ,[object Object],[object Object],Chapter 16 In this chapter you will:

Table of Contents Chapter 16: Fundamentals of Light Section 16.1: Illumination Section 16.2: The Wave Nature of Light Chapter 16

Illumination ,[object Object],[object Object],[object Object],In this section you will: Section 16.1

Illumination ,[object Object],[object Object],[object Object],[object Object],Light Section 16.1

Illumination ,[object Object],[object Object],[object Object],Light Section 16.1

Illumination ,[object Object],[object Object],[object Object],[object Object],Ray Model of Light Section 16.1

Illumination ,[object Object],[object Object],Ray Model of Light Section 16.1

Illumination ,[object Object],[object Object],[object Object],[object Object],Sources of Light Section 16.1

[object Object],[object Object],[object Object],Illumination Sources of Light Section 16.1 ,[object Object]

Illumination ,[object Object],[object Object],Sources of Light Section 16.1 ,[object Object],[object Object],[object Object]

Illumination ,[object Object],[object Object],Sources of Light Section 16.1

Illumination ,[object Object],Quantity of Light Section 16.1 ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Illumination Quantity of Light Section 16.1

Illumination ,[object Object],[object Object],Quantity of Light Section 16.1 ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Illumination An Inverse-square Relationship Section 16.1

Illumination ,[object Object],[object Object],[object Object],[object Object],Section 16.1 An Inverse-square Relationship

Illumination ,[object Object],[object Object],[object Object],[object Object],Luminous Intensity Section 16.1

Illumination ,[object Object],Luminous Intensity Section 16.1

Illumination ,[object Object],[object Object],[object Object],[object Object],[object Object],How to Illuminate a Surface Section 16.1

Illumination ,[object Object],[object Object],How to Illuminate a Surface Section 16.1 ,[object Object],[object Object]

Illumination ,[object Object],[object Object],[object Object],How to Illuminate a Surface Section 16.1

Illumination Illumination of a Surface What is the illumination on your desktop if it is lighted by a 1750-lm lamp that is 2.50 m above your desk? Section 16.1

Illumination Step 1: Analyze and Sketch the Problem Section 16.1 Illumination of a Surface

Illumination Assume that the lightbulb is a point source. Section 16.1 Illumination of a Surface

Illumination Diagram the position of the bulb and desktop, and label P and r . Section 16.1 Illumination of a Surface

Illumination Identify the known and unknown variables. Section 16.1 Known: P = 1.75 ×10 3 lm r = 2.50 m Unknown: E = ? Illumination of a Surface

Illumination Step 2: Solve for the Unknown Section 16.1 Illumination of a Surface

Illumination The surface is perpendicular to the direction in which the light ray is traveling, so you can use the point source illuminance equation. Section 16.1 Illumination of a Surface

Illumination Substitute P = 1.75×10 3 lm, r = 2.50 m Section 16.1 = 22.3 lm/m 2 = 22.3 lx Illumination of a Surface

Illumination Step 3: Evaluate the Answer Section 16.1 Illumination of a Surface

Illumination ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Section 16.1 Illumination of a Surface

Illumination ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The steps covered were: Section 16.1 Illumination of a Surface

Illumination ,[object Object],[object Object],[object Object],[object Object],How to Illuminate a Surface Section 16.1

Illumination ,[object Object],[object Object],[object Object],[object Object],The Speed of Light Section 16.1

Illumination ,[object Object],[object Object],The Speed of Light Section 16.1

[object Object],[object Object],[object Object],Illumination Measurements of the Speed of Light Section 16.1

Illumination ,[object Object],[object Object],[object Object],[object Object],Measurements of the Speed of Light Section 16.1

Illumination ,[object Object],[object Object],[object Object],Measurements of the Speed of Light Section 16.1

Section Check ,[object Object],Question 1 Section 16.1 ,[object Object],[object Object],[object Object],[object Object]

Section Check ,[object Object],Answer 1 Section 16.1 Reason: The ray model of light was introduced to study how light interacts with matter regardless of whether light is a particle or wave.

Section Check ,[object Object],Answer 2 Section 16.1 Reason: Illuminance caused by a point source is proportional to 1/(distance) 2 .  Change will be 1/3 2 = 1/9.

Section Check ,[object Object],Answer 3 Section 16.1 Reason: Illuminance caused by a surface is proportional to 1/(distance) 2 . Since the ratio of illuminance of the bulb and the candle is 4:1, the distance of the screen from the bulb and the candle should be  4:  1, i.e. 2:1.

The Wave Nature of Light ,[object Object],[object Object],[object Object],In this section you will: Section 16.2

The Wave Nature of Light Diffraction and the Wave Model of Light Section 16.2 Click image to view movie.

[object Object],[object Object],[object Object],The Wave Nature of Light Color Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],Color Section 16.2

The Wave Nature of Light ,[object Object],[object Object],Color Section 16.2

[object Object],[object Object],[object Object],The Wave Nature of Light Color by Addition of Light Section 16.2

[object Object],[object Object],The Wave Nature of Light Color by Addition of Light Section 16.2 ,[object Object]

[object Object],The Wave Nature of Light Color by Addition of Light Section 16.2 ,[object Object]

The Wave Nature of Light ,[object Object],[object Object],[object Object],Color by Subtraction of Light Section 16.2

[object Object],[object Object],The Wave Nature of Light Section 16.2 Color by Subtraction of Light

The Wave Nature of Light ,[object Object],[object Object],[object Object],Color by Subtraction of Light Section 16.2 ,[object Object],[object Object]

[object Object],[object Object],[object Object],The Wave Nature of Light Color by Subtraction of Light Section 16.2

[object Object],[object Object],The Wave Nature of Light Color by Subtraction of Light Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],Color by Subtraction of Light Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],Results in Color Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],[object Object],Polarization of Light Section 16.2

The Wave Nature of Light ,[object Object],[object Object],Polarization by Filtering Section 16.2

[object Object],[object Object],The Wave Nature of Light Polarization by Filtering Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],[object Object],Polarization by Filtering Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],Polarization by Filtering Section 16.2 ,[object Object]

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],Polarization by Reflection Section 16.2

The Wave Nature of Light ,[object Object],[object Object],Polarization by Reflection Section 16.2

[object Object],[object Object],The Wave Nature of Light Section 16.2 Polarization Analysis

[object Object],The Wave Nature of Light Section 16.2 Polarization Analysis

The Wave Nature of Light ,[object Object],[object Object],Polarization Analysis Section 16.2 ,[object Object],Malus’s Law

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],Polarization Analysis Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],[object Object],The Speed of a Light Wave Section 16.2

The Wave Nature of Light ,[object Object],[object Object],[object Object],The Speed of a Light Wave Section 16.2

The Wave Nature of Light Relative Motion and Light Section 16.2 Click image to view movie.

The Wave Nature of Light ,[object Object],[object Object],[object Object],The Doppler Effect Section 16.2

The Wave Nature of Light ,[object Object],The Doppler Effect Section 16.2 ,[object Object],[object Object]

The Wave Nature of Light ,[object Object],The Doppler Effect Section 16.2 ,[object Object],[object Object],Doppler Shift

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],The Doppler Effect Section 16.2

[object Object],[object Object],The Wave Nature of Light Section 16.2 The Doppler Effect

The Wave Nature of Light ,[object Object],[object Object],[object Object],[object Object],[object Object],The Doppler Effect Section 16.2

Section Check ,[object Object],Answer 1 Section 16.2 Reason: Light travels in the form of a wave and a wave can bend around objects. Hence, even though light travels in a straight line due to the wave nature of light, it bends at the edges of the object. Hence, shadows appear wider than the objects.

Section Check ,[object Object],Answer 2 Section 16.2 Reason: Cyan and red are complementary colors and the combination of complimentary colors results in a white color.

Section Check ,[object Object],Answer 3 Section 16.2 Reason: Magenta absorbs green and cyan absorbs red. Hence, due to the absorption of green and red, blue pigment will be formed.

End of Chapter Fundamentals of Light Chapter 16

Illumination Illumination of a Surface What is the illumination on your desktop if it is lighted by a 1750-lm lamp that is 2.50 m above your desk? Section 16.1 Click the Back button to return to original slide.

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