5. Consider a single ray from the source to the mirror and let θ be the angle of incidence. The angle of
reflection is also θ and the reflected ray makes an angle of 2θ with the incident ray. Now we rotate the
mirror through the angle α so that the angle of incidence increases to θ + α. The reflected ray now
makes an angle of 2(θ + α) with the incident ray. The reflected ray has been rotated through an angle
of 2α. If the mirror is rotated so the angle of incidence is decreased by α,then the reflected ray makes
an angle of 2(θ
− α) with the incident ray. Again it has been rotated through 2α. The diagrams below
show the situation for α = 45
◦
. The ray from the object to the mirror is the same in both cases and the
reflected rays are 90
◦
apart.
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•
•
O
I
θ + α
θ + α
Document Outline
- Main Menu
- Chapter 1 Measurement
- Chapter 2 Motion Along a Straight Line
- Chapter 3 Vectors
- Chapter 4 Motion in Two and Three Dimensions
- Chapter 5 Force and Motion I
- Chapter 6 Force and Motion II
- Chapter 7 Kinetic Energy and Work
- Chapter 8 Potential Energy and Conservation of Energy
- Chapter 9 Systems of Particles
- Chapter 10 Collisions
- Chapter 11 Rotation
- Chapter 12 Rolling, Torque, and Angular Momentum
- Chapter 13 Equilibrium and Elasticity
- Chapter 14 Gravitation
- Chapter 15 Fluids
- Chapter 16 Oscillations
- Chapter 17 Waves—I
- Chapter 18 Waves—II
- Chapter 19 Temperature, Heat, and the First Law of Thermodynamics
- Chapter 20 The Kinetic Theory of Gases
- Chapter 21 Entropy and the Second Law of Thermodynamics
- Chapter 22 Electric Charge
- Chapter 23 Electric Fields
- Chapter 24 Gauss’ Law
- Chapter 25 Electric Potential
- Chapter 26 Capacitance
- Chapter 27 Current and Resistance
- Chapter 28 Circuits
- Chapter 29 Magnetic Fields
- Chapter 30 Magnetic Fields Due to Currents
- Chapter 31 Induction and Inductance
- Chapter 32 Magnetism of Matter: Maxwell’s Equation
- Chapter 33 Electromagnetic Oscillations and Alternating Current
- Chapter 34 Electromagnetic Waves
- Chapter 35 Images
- 35.1 - 35.10
- 35.1
- 35.2
- 35.3
- 35.4
- 35.5
- 35.6
- 35.7
- 35.8
- 35.9
- 35.10
- 35.11 - 35.20
- 35.11
- 35.12
- 35.13
- 35.14
- 35.15
- 35.16
- 35.17
- 35.18
- 35.19
- 35.20
- 35.21 - 35.30
- 35.21
- 35.22
- 35.23
- 35.24
- 35.25
- 35.26
- 35.27
- 35.28
- 35.29
- 35.30
- 35.31 - 35.40
- 35.31
- 35.32
- 35.33
- 35.34
- 35.35
- 35.36
- 35.37
- 35.38
- 35.39
- 35.40
- 35.41 - 35.50
- 35.41
- 35.42
- 35.43
- 35.44
- 35.45
- 35.46
- 35.47
- 35.48
- 35.49
- 35.50
- 35.51 - 35.60
- 35.51
- 35.52
- 35.53
- 35.54
- 35.55
- 35.56
- 35.57
- 35.58
- 35.59
- 35.60
- 35.61 - 35.64
- 35.61
- 35.62
- 35.63
- 35.64
- 35.1 - 35.10
- Chapter 36 Interference
- Chapter 37 Diffraction
- Chapter 38 Special Theory of Relativity
- Chapter 39 Photons and Matter Waves
- Chapter 40 More About Matter Waves
- Chapter 41 All About Atoms
- Chapter 42 Conduction of Electricity in Solids
- Chapter 43 Nuclear Physics
- Chapter 44 Energy from the Nucleus
- Chapter 45 Quarks, Leptons, and the Big Bang
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