Classical Physics

A man wearing head-mounted infrared goggles used for thermal imaging

Infrared goggles: the physics of seeing the invisible

Infrared goggles enable us to see in total darkness by detecting invisible thermal radiation and converting it into images that our brain can understand

Classical Physics

Physics Core

Feb 22

Illustration showing a smug student on the left, a chalkboard with a right triangle labeled with sides 1 and i and a calculation leading to hypotenuse equals zero in the center, and a shocked Pythagoras on the right, representing misuse of mathematical formulas outside their valid domain.

Unit systems in physics and why we use them

A viral math meme reveals a serious lesson: without consistent unit systems, equations lose their meaning. Learn why physics depends on SI units and dimensional consistency.

Classical Physics

Physics Core

Jan 25

Illustration titled “Acceleration Unit” showing the formula 𝑎 = Δ 𝑣 / Δ 𝑡 a=Δv/Δt and the unit expression 𝑚 / ( 𝑠 ⋅ 𝑠 ) = 𝑚 / 𝑠 2 m/(s⋅s)=m/s 2 . A hand holding a feather quill appears on the right side against a soft blurred background.

What does 'seconds squared' mean in acceleration units (m/s²)?

Why does acceleration use “seconds squared”? We break down the m/s² unit step by step and show what it really means in everyday motion

Classical Physics

Physics Core

Jan 23