Question 39
Dispersion of Light and ColoursWhich of the figures below illustrates the dispersion of white light through a triangular glass prism?
- A.Figure A
- B.Figure B
- C.Figure C
- D.Figure D
Show the answer and explanation
Answer: C (Figure C)
Explanation
Each colour has a different refractive index, so white light starts to split into colours as soon as it enters the glass and spreads further on leaving, as in figure C.