In obtaining an X-ray photograph of our hand we use the principle of______________?
Correct answer: C. shadow photograph
- A. photo electric effect
- B. ionization
- C. shadow photograph
- D. any of above
Explanation
An X-ray photograph records the shadow pattern formed because different tissues absorb different amounts of X-ray radiation. Bones absorb more strongly than soft tissue, creating contrast on the photographic plate or detector. The likely mistake is choosing the photoelectric effect, which may occur in the detector but is not the imaging principle named here.
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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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