באתר זה נעשה שימוש בקבצי עוגיות בין היתר של צדדים שלישיים. חלקן חיוניות לחוויית גלישה תקינה וחלק משמשות לסטטיסטיקה ושיווק. המשך גלישה באתר מהווה הסכמה לשימוש זה. המידע נשמר בהתאם למדיניות הפרטיות של מכון דוידסון.
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Displaying 4 Articles
Ask the expert Physics
A Brief History Of Measurements

A Brief History Of Measurements

How long does a second last? Who determined the length of a meter and the weight of a Kilo? How were the units that we use to measure weight and distances determined?

Amit Pando
calendar 24.2.2025
reading-time 6 minutes
Ask the expert Physics
Why is the Night Sky Dark?

Why is the Night Sky Dark?

If the universe is infinite and filled with shining stars, we might expect a continuously bright sky. Why then is it dark at night?

Amit Pando
calendar 8.8.2024
reading-time 6 minutes
Science Archive
The physics of light

The physics of light

Light is the common name for electromagnetic radiation with wavelengths of 400-750 nm.

Davidson Staff
calendar 17.7.2012
reading-time 5 minutes
Ask the expert
Can a laser beam be used to stop an asteroid by producing an opposite momentum (velocity and mass)? Or

Can a laser beam be used to stop an asteroid by producing an opposite momentum (velocity and mass)? Or

A laser beam is a ray of light with high intensity generated through the stimulated

Davidson Staff
calendar 23.2.2012
reading-time 4 minutes