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# A ray of red light passes through a glass block, as shown in Figure.(i) On Figure, clearly label the angle of refraction.(ii) State the name given to the dashed line drawn at $$90^\circ$$ to the boundary.

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Q1

Draw a labelled ray diagram to show how a ray of light passes through a parallel sided glass block : (a) if it hits the glass block at 90° (that is, perpendicular to the glass block) (b) if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block).

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Q2
Draw a labelled ray diagram to show how a ray of light passes through a parallel sided glass block:

(a) if it hits the glass block at 90° (that is, perpendicular to the glass block)
(b) if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block).
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