# भौतिक विज्ञानं

NOTES FOR भौतिक विज्ञानं IN HINDI FOR GOVT JOBS EXAM

## आसमान नीला क्यों होता है

आसमान नीला क्यों होता है Why is the sky blue short answer? पृथ्वी के वायुमंडल में गैसें और कण सभी दिशाओं में सूर्य के प्रकाश को बिखेरते हैं। नीली रोशनी अन्य रंगों की तुलना में अधिक बिखरी हुई है क्योंकि यह छोटी, छोटी तरंगों के रूप में यात्रा करती है। यही कारण है कि हमें …

## Biconvex Lens

Biconvex Lens A lens is a type of optical instrument. Which works on the principle of refraction of light. Lenses are used in almost all light illuminator devices. For example, lenses are used in cameras, projectors, telescopes, microscopes etc. Lanes are mainly made of glass but some lenses are also made of plastic etc.  Type …

## Uniform Motion

Uniform Motion In our daily life we see some objects in motion e.g., walking men, moving cars, running trains, and some objects at rest e.g., furnitures, houses, trees, etc. In both the cases, we see that in motion, the position of objects change with time while at rest, the position of obiects do not change …

## Dimensional Formula

Dimensional Formula Physical Quantities  Anything which can be expressed in numbers is called quantity. Different events in nature take place in accordance with some basic laws. Revealing these laws of nature from the observed events, we need some quantities which are known as physical quantities. e.g., length, mass, temperature, time, force, speed, distance, acceleration, velocity, …

## Gravitation Class 9 Notes

Gravitation Class 9 Notes Gravitation(गुरुत्वाकर्षण) Gravitation(गुरुत्वाकर्षण)  is defined as the non-contact force of attraction between any two bodies in the universe. The earth attracts all the bodies towards its centre. The force with which the earth pulls the bodies towards it, is called the gravitational force of earth or gravity of the earth. (गुरुत्वाकर्षण ब्रह्मांड …