Question detail
A blue card is viewed under white light in a classroom optics demonstration. Which explanation correctly uses reflected and absorbed visible light to explain the colour of an opaque object?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Electromagnetic waves
Question
- A. The card looks blue because it reflects blue light and absorbs most other visible wavelengths.
- B. The card looks blue because blue light is transmitted through it like a transparent filter.
- C. The card looks blue because ultrasound waves are reflected from its surface.
- D. The card looks blue because all visible wavelengths pass through the opaque material.
Answer
The correct answer is: The card looks blue because it reflects blue light and absorbs most other visible wavelengths.
Explanation
The card looks blue because it reflects blue light and absorbs most other visible wavelengths. is correct. Opaque-object colour depends on which wavelengths of visible light are reflected to the eye and which are absorbed by the surface. This stays anchored to reflected and absorbed light rather than confusing opaque objects with transparent filters.
Common mistake
Visible light (physics only) common mistake 1
Giving a vague answer instead of directly addressing: (Physics only) Explain the colour of an opaque object in terms of reflected and absorbed light..
Answer by clearly explaining how to (Physics only) Explain the colour of an opaque object in terms of reflected and absorbed light..
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