QQuestion
Determine the angle of deviation for the refraction of light rays from rarer to denser medium. [2]
(angle of incidence = i, angle of refraction = r)
OR
Why do the green leaves of trees appear ‘green’ in sunlight? [2]
✓Answer
The angle of deviation (δ) for light rays passing from a rarer to a denser medium is given by:
δ = i−r
Where:
- i is the angle of incidence,
- r is the angle of refraction.
OR
Green leaves appear green because they contain a pigment called chlorophyll, which absorbs most of the blue and red wavelengths of light and reflects the green wavelength. Since green light is reflected, it is the colour we see.
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