## Dependence of nuclear radius on nucleon number

What is the relationship between the radius of a nucleus, *R*, and the number of nucleons in the nucleus , *A* (AKA the mass number, *N*)?

Use the following data to investigate this. Assuming it is a power relationship, recall that we can find the log of both sides in order to discover what this power is.

Nucleon number, A |
Nuclear radius, R (fm) |

7 | 2.30 |

14 | 2.89 |

31 | 3.77 |

88 | 5.34 |

120 | 5.92 |

157 | 6.47 |

197 | 6.98 |

239 | 7.45 |

## Interference and Diffraction

- Constructive and destructive interference
- Young (double slit diffraction)
- Fraunhofer (single slit diffraction)

## Huygens’ Principle and Wavefronts

- Huygens’ principle
- Diffraction and Reflection
- Refraction

**Huygens’ Principle**

Given that waves are caused by a source of disturbance, and that waves themselves cause disturbance as they propagate, Christiaan Huygens (1629-1695) treated waves along the principle that:

Every point on a wave may be considered as a point source disturbance, causing secondary waves that spread out evenly in all directions with a speed equal to the speed of propagation of the wave.

**Diffraction and Reflection**

**1)**

**2)**

**3)**

**Refraction**

## Electrical Power

This slideshow starts with energy changes, particularly in electrical devices. Various devices are presented as discussion points.

The concept of Power is introduced, along with the equation P=E/t

## Introduction to Waves

**Transverse** and **longitudinal** waves, sometimes called s-waves and p-waves respectively, are demonstrated in these videos. Transverse waves oscillate perpendicular to the direction of motion, and longitudinal waves oscillate in the direction of motion.

**Frequency, Wavelength and Wave Speed**

**Extras**

**Waves and circular motion**

**Phase Difference**

**How Tsunamis are formed**

leave a comment