In monochromatic red light a blue book will appear:
Correct answer: C. Black
- A. Blue
- B. Red
- C. Black
- D. Purple
Explanation
When monochromatic red light is shone on a blue book, the book will appear black. This is because the color of an object is determined by the wavelength of light it reflects. In this case, the blue book does not reflect the longer wavelengths of red light, causing it to appear black. The other options are incorrect because the book will not reflect blue (Option A), red (Option B), or purple (Option D) light under monochromatic red light.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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