Physics and Mental Health Overview

Study Notes

Reflection is the bouncing back of light, sound, or heat when it hits a surface.
The angle of incidence equals the angle of reflection.
Reflection can be specular or diffuse:
- Specular reflection occurs when light hits a smooth surface, creating a clear, distinct image.
- Diffuse reflection occurs when light hits a rough surface, scattering the light in many directions, creating a less distinct image.
Reflection is crucial in our daily lives:
- Allows us to see objects.
- Affects the way light interacts with different materials.

Depression is a mood disorder characterized by persistent feelings of sadness, hopelessness, and loss of interest in activities.
It is a common mental health issue, affecting millions worldwide.
Symptoms can vary from person to person but often include:
- Persistent sadness and low mood
- Loss of interest or pleasure in activities
- Changes in appetite or sleep patterns
- Fatigue or lack of energy
- Feelings of worthlessness or excessive guilt
- Difficulty concentrating or making decisions
- Thoughts of death or suicide
Various factors can contribute to depression, including:
- Genes
- Brain chemistry
- Environmental factors (e.g., trauma, stressful life events)
- Medication side effects
Treatments for depression typically include:
- Psychotherapy:
  - Cognitive behavioral therapy (CBT) helps identify and change negative thought patterns.
  - Interpersonal therapy focuses on improving relationships and social skills.
- Medications:
  - Antidepressants aim to alter brain chemicals that affect mood.
- Lifestyle changes that can help reduce symptoms:
  - Regular exercise
  - Healthy diet
  - Adequate sleep
  - Stress management techniques
Importance of seeking professional help if experiencing symptoms of depression.
Depression can be effectively treated, and recovery is possible.