# Kepler’s Law of Planetary Motion

Class 11 Physics Chapter 8 Gravitation Stories of planetary motion, theories and phenomena always attracted scientist. Johannes Kepler studied planetary motion and formulated his finding in three laws. In this article let’s talk about kepler’s law in which we will discuss in brief about law of orbits, law of areas and law of periods. Kepler’s […]

# Doppler effect

Class 12 Physics Chapter 10 Wave Optics Huygen’s principle shows that, if the shape of wavefront is known at time t =0, then it is possible to find the shape of wavefront at later time 𝜏. But this becomes bit difficult if there is relative motion between the source and the observer. The phenomena that […]

# How does lens in human eye works?

Class 12 Physics Chapter 9 Ray Optics and Optical Instruments | Class 10 Chapter 11 Human Eye and the Colourful World Human eye consist of crystalline lens, which provides fine adjustments of focal length. This allows the eyes to see nearby and distant objects by making lens thin or flat. Interestingly, the normal vision of […]

# Atmospheric Refraction

Class 10 Chapter 7 Wonders of Light In this article we are going to talk about atmospheric refraction. Some examples of atmospheric refraction are wavering, twinkling of stars, advanced sunrise and delayed sunset Atmospheric Refraction – Wavering or Flickering In summer days, during afternoon, we can see apparent, random wavering on the hot road. This […]

# Capacitor and Capacitance

Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance Capacitor have an ability to store charge. It is a system of two charged conductors separated by an insulator. The conductor have charges Q1 and Q2 and potentials V1 and V2 respectively. Most of the times there are Q and -Q, with potential difference V= V1 […]

# Working of Nuclear Reactor

Class 12 Physics Chapter 13 Nuclei Nuclear reactor helps to carry out controlled chain reaction and also produce energy in sustained manner. Produced energy can be used to produce electric energy. In this article we will discuss about nuclear reactor, its parts and their function. Nuclear Fuel Nuclear fuel is the fissionable material used in […]

# How is Rainbow Formed?

There are various natural phenomena like blue color of sky, white clouds, red hue at sunrise and sunset and many more. In this article we will discuss about rainbow and its formation in the sky. Rainbow occurs due to result of refraction , dispersion and reflection of sunlight. For its formation, there is need of […]

# Force – Definition and Types

Class 8 Science Chapter 11 Force and Pressure In this article we will take a brief discussion on force. So what exactly happens when you kick a ball? When you kick a ball, the ball starts moving. This means to move a ball you need to apply some amount of force in form of a […]

# Formation of Lightning in the Sky

Class 8 Science Chapter 15 Some Natural Phenomena Lightning in sky is kind of electric spark. In this article we will talk about lightning formation and safety measures at time of lightning. During development of thunderstorm, air current move upward, at the same time, water droplets move downwards. Hence there is rubbing action between them. […]

# What is Moment of Inertia in Physics?

Class 11 Physics Chapter 7 System of Particle and Rotational Motion In linear motion, we have linear velocity. Analogues to this, in rotational motion we have angular velocity. In the same manner, in this article, we will find analogue to mass in rotational motion. Lets talk about moment of inertia, an analogue to mass in […]