There isn't a universally accepted division of physics into exactly seven compartments. However, physics is often broadly categorized into these major areas:

1. Classical Mechanics: Deals with the motion of objects under the influence of forces. It includes topics like kinematics, dynamics, work, energy, momentum, and conservation laws.

2. Thermodynamics and Statistical Mechanics: Studies heat, work, and temperature, and their relation to energy and entropy. It also explores the behavior of systems with many particles, like gases and liquids.

3. Electromagnetism: Investigates the relationships between electric and magnetic fields, including electricity, magnetism, light, and electromagnetism.

4. Optics: Focuses on the behavior of light, including reflection, refraction, diffraction, interference, and polarization.

5. Quantum Mechanics: Deals with the behavior of matter and energy at the atomic and subatomic level. It explains phenomena like wave-particle duality, quantum entanglement, and atomic structure.

6. Relativity: Includes both special relativity, which addresses the relationship between space and time, and general relativity, which deals with gravity and its influence on spacetime.

7. Nuclear Physics: Studies the structure, properties, and interactions of atomic nuclei, including radioactivity, nuclear reactions, and nuclear energy.

These are broad categories, and within each, there are many subfields and specialized areas of research. For example, within quantum mechanics, there are fields like quantum field theory, condensed matter physics, and particle physics.

It's important to note that the boundaries between these areas are not always clear-cut, and there is often significant overlap and interdisciplinary work.