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Refraction of light through a Convex Lens. Lens diagram a cross section through the centre plane.

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Presentation on theme: "Refraction of light through a Convex Lens. Lens diagram a cross section through the centre plane."— Presentation transcript:

1 Refraction of light through a Convex Lens

2 Lens diagram a cross section through the centre plane.

3 Simple convex (curves outwards) lens

4 Simple concave (curves inwards) lens

5 Convex lens Concave lens

6 Lens is in a vertical plane, straight up and down on the page.

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10 Lens Air

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12 Light ray

13 Light ray is horizontal (at a right angle) to vertical lens

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15 Extension of right ray Light ray is horizontal (at a right angle) to vertical lens

16 Extension of right ray Light ray is horizontal (at a right angle) to vertical lens

17 Centre line of the lens Extension of right ray Light ray is horizontal (at a right angle) to vertical lens

18 Extension of right ray Light ray is horizontal (at a right angle) to vertical lens Centre line of the lens

19 Right angle to the centre line of the lens Extension of right ray Light ray is horizontal (at a right angle) to vertical lens Centre line of the lens

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23 The perpendicular

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25 Right angle to the surface of the lens

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65 Centre line of the lens

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68 Perpendicular to the centre line of the lens, passing through the centre point of the lens Centre line of the lens

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70 Light ray

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81 The focus or focal point

82 F Focus

83 F

84 F

85 F

86 F

87 F

88 F

89 F

90 F

91 F

92 F

93 FF

94 FF

95 FF

96 FF

97 FF

98 FF

99 FF

100 FF

101 FF

102 FF

103 FF

104 FF

105 FF

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109 F

110 F

111 F Focal length Focus

112 This distance from the centre of the lens to the focus point, will be given to you as a point on a diagram or a measurement such as 3cm. F Focal length Focus

113 F Focal length Focus

114 F Focal length Focus

115 2 x focal length F Focal length Focus

116 2 x focal length F Focal length Focus

117 2 x focal length FF2F2 Focal length Focus

118 2 x focal length F1F1 F2F2 Focal length Focus

119 Focal length 2 x focal length F1F1 F2F2 Focus

120 Focal length 2 x focal length F1F1 F2F2 Focal length Focus

121 Focal length 2 x focal length F1F1 F2F2 Focal length Focus

122 Focal length 2 x focal length F1F1 F2F2 Focal length Focus

123 Focal length 2 x focal length F1F1 F2F2 F1F1 Focal length Focus

124 Focal length 2 x focal length F1F1 F2F2 F1F1 Focal length Focus

125 Focal length 2 x focal length F1F1 F2F2 F1F1 Focal length 2 x focal length Focus

126 Focal length 2 x focal length F1F1 F2F2 F1F1 Focal length 2 x focal length Focus

127 Focal length 2 x focal length F1F1 F2F2 F1F1 F2F2 Focal length 2 x focal length Focus

128 F1F1 F1F1 F2F2 F2F2

129 F1F1 F1F1 F2F2 F2F2

130 F1F1 F1F1 F2F2 F2F2 Object located beyond 2 focal lengths (F 2 )

131 F1F1 F1F1 F2F2 F2F2

132 F1F1 F1F1 F2F2 F2F2

133 F1F1 F1F1 F2F2 F2F2

134 F1F1 F1F1 F2F2 F2F2

135 F1F1 F1F1 F2F2 F2F2 Light rays converge at this point.

136 F1F1 F1F1 F2F2 F2F2 A real image is formed. A real image can be projected onto a screen.

137 F1F1 F1F1 F2F2 F2F2 The image is inverted (up-side down) and smaller than the original object.

138 F1F1 F1F1 F2F2 F2F2 When the object is located beyond 2 focal lengths (F 2 )

139 F1F1 F1F1 F2F2 F2F2 The image created is real, inverted and smaller than the original object.

140 F1F1 F1F1 F2F2 F2F2 When the object is located beyond 2 focal lengths (F 2 ) The image created is real, inverted and smaller than the original object. The rays converge between 1 and 2 focal lengths

141 F1F1 F1F1 F2F2 F2F2 Other rays can be added from different points on the object

142 F1F1 F1F1 F2F2 F2F2

143 F1F1 F1F1 F2F2 F2F2

144 F1F1 F1F1 F2F2 F2F2

145 F1F1 F1F1 F2F2 F2F2

146 F1F1 F1F1 F2F2 F2F2

147 F1F1 F1F1 F2F2 F2F2

148 F1F1 F1F1 F2F2 F2F2

149 F1F1 F1F1 F2F2 F2F2

150 F1F1 F1F1 F2F2 F2F2 These extra rays all converge at the same point between 1 and 2 focal lengths.

151 F1F1 F1F1 F2F2 F2F2 These extra rays are unnecessary for our purposes.

152 F1F1 F1F1 F2F2 F2F2 Draw rays only from the top point of your object. This will keep your diagram simple and easy to understand

153 F1F1 F1F1 F2F2 F2F2

154 F1F1 F1F1 F2F2 F2F2

155 F1F1 F1F1 F2F2 F2F2

156 F1F1 F1F1 F2F2 F2F2

157 F1F1 F1F1 F2F2 F2F2

158 F1F1 F1F1 F2F2 F2F2

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