X-Rays
Physics ⇒ Modern Physics
X-Rays starts at 11 and continues till grade 12.
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See sample questions for grade 11
A crystal diffracts X-rays of wavelength 0.154 nm at a glancing angle of 30°. Calculate the spacing between the crystal planes (n = 1).
Calculate the minimum wavelength of X-rays produced when electrons are accelerated through a potential difference of 50,000 V. (Take h = 6.63 × 10-34 J·s, c = 3.0 × 108 m/s, e = 1.6 × 10-19 C)
Describe one industrial application of X-rays.
Describe the difference between hard X-rays and soft X-rays.
Describe the role of the anode in an X-ray tube.
Explain the basic principle of X-ray production in an X-ray tube.
Explain the term 'X-ray fluorescence'.
Explain why X-rays are called 'ionizing radiation'.
Explain why X-rays are dangerous to living tissues.
Explain why X-rays are not suitable for imaging soft tissues as clearly as bones.
Name two main types of X-rays produced in an X-ray tube.
State Bragg's law for X-ray diffraction.
State one medical use of X-rays other than imaging bones.
State one reason why tungsten is commonly used as the target material in X-ray tubes.
The energy of an X-ray photon is 1.24 × 10-15 J. Calculate its wavelength. (Take h = 6.63 × 10-34 J·s, c = 3.0 × 108 m/s)
The intensity of X-rays emerging from a material decreases exponentially with thickness. State the mathematical expression for this law.
Which part of the X-ray tube emits electrons?
Which scientist first observed the diffraction of X-rays by crystals?
Who discovered X-rays?
