Question
| A. Continuous X-rays | All possible wavelength |
| B. Characteristics X-rays | Definite wavelength |
| C. X-ray | Short focal length |
| D. Intensity of X-rays | Constant for all Substances |
| A. Continuous X-rays | All possible wavelength |
| B. Characteristics X-rays | Definite wavelength |
| C. X-ray | Short focal length |
| D. Intensity of X-rays | Constant for all Substances |
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| A. Potential barrier | work function |
| B. Stopping potential | Maximum potential between the electrodes |
| C. Threshold frequency | minimum frequency of incident radiation for emission |
| D. Saturation current | Maximum photoelectrons |
| Column I | Column - II |
| i) Interference of light | (1) Coherent source |
| ii) Brewster's law | (2)μ = sin i/ sin r |
| iii) Diffraction of light | (3) Obstacle // aperture size =1 |
| iv) Law of Malus | (4) $I=I_0 \cos ^2 \theta$ |
| A. Photo electrons | directly proportional to the intensity of incident radiation |
| B. Kinetic energy of photoelectrons | independent of the intensity of incident light |
| C. Maximum kinetic energy of photoelectrons | directly proportional to the frequency of incident light |
| D. Emission of photoelectrons | does not depend upon the potential of the electrodes |
| Column I | Column - II |
| i) Reflection | (1) Change in the path of light without a change in medium |
| ii) Refraction | (2) mu=sin i//sin r |
| iii) Interference | (3) Fibre-optic communication |
| iv) Polarisation | (4) used for reducing glare. |