Shadows

Shadows
Difficulty 2/10 ~12 min Start Lesson →

🎯 Learning Objectives

  • Students will be able to explain shadow formation using straight-line light propagation
  • Students will be able to distinguish between umbra and penumbra
  • Students will be able to predict shadow formation and size

🧠 Core Concepts

  • umbra
  • penumbra
  • point_source
  • extended_source
  • light_blocking
Start Lesson Study Material

Report an Issue

We use cookies
We use essential cookies to make our platform work. With your permission, we also use analytics cookies to understand how you use the platform and improve your experience.
Cookie preferences
Choose which cookies you allow. Essential cookies are always active because they are necessary for the platform to function. Analytics cookies help us understand how you use the platform.
Essential cookies Always active
Required for the platform to function. These cookies handle authentication, security, and session management. They cannot be disabled.
Cookie Provider Purpose Lifetime
physo-click-session Physo.click Authentication and session management 30 days
XSRF-TOKEN Physo.click Security — prevents cross-site request forgery Session
remember_web_* Physo.click "Remember me" auto-login 60 days
cookie_consent Physo.click Stores your cookie preferences 1 year
Analytics cookies
Help us understand how visitors interact with the platform. This data is used to improve features and user experience. No personal data is sold or shared with advertisers.
Cookie Provider Purpose Lifetime
_ga, _ga_*, _gid Google Page views and usage analytics 2 years
_clid, _clck Microsoft Session recordings and heatmaps 1 year