Across
- 4. the target in a Coolidge tube
- 9. the kind on waves that x ray is
- 11. combination of heater cathode and anode
- 13. study hearts action
Down
- 1. minimum energy required for an electron to be emitted
- 2. a metal with low work function
- 3. cause this phenomenon in ZnS
- 5. the scientist who explains photo electric effect
- 6. device to convert light to electrical energy
- 7. discovered in the year 1895
- 8. short wavelength x-rays
- 10. another name for critical value
- 12. intensity controlled by changing this