Chapters

Wave Motion

Waves are caused by vibration in a medium which carries energy from one point to another without a direct contact between the two points.

Mechanical waves

Machenical waves are also known as elastic waves. These waves need a material medium for their propagation(travel). Sound waves and water waves are example of mechanical waves.

Electromagnetic waves

These waves do not need a material medium to propogate(travel). They can travel even through vaccum, they travelles with a very high speed of 3 × 108 m/s.

Transverse Waves

A wave in which the particles of the medium vibrate up and down(at right angles) to the direcction in which the wave is moving, is called a transverse wave. The water waves formed on the surgace of water in a pond are example of transverse wave.

Longitudinal Waves

A wave in which the particles of the medium vibrates back and forth in the 'same direction' in which the wave is moving is called a longitudinal wave. The wave travelling along a spring when it is pushed and pulled are longitudinal waves.

Pulse Waves

A waves set up by a single disturbance in the medium are called pulses. The formation of water waves on the surface of water when a stone is dropped into it is an example of wave pulses, the sound waves produced by te clapping og hands is also an example of wave pulss

Periodic Waves

The waves which are caused by continuous disturbance in the medium occurring due to regular vibrations are valled periodic waves. Periodic waves are repeative in nature. When a periodic wave is formed, the medium oscillates for a long time after it is disturbed.

Characterstics of Waves

To understand the concept of waves we must know the characterstics of waves. The main characterstics of waves are as follow:

  1. Wavelength: The distance between two nearest points in a wave which are in the same phase of vibration is known as the wavelength.
  2. Amplitude: The maximum height or distance moved by a point on a vibrating body or wave, measured from its equilibrium(central) position.
  3. Time Period: The time required to produce one complete wave is called time period of the wave.The time taken to cimplete one vibration is called time period.
  4. Frequency: The number of vibrations produced in one second is called frequency of the wave
  5. Velocity of wave: The distance travelled by a wave in one second is called velocity of the wave. Velocity of wave = Frequency of wave × wavelength of wave

Latest Current Affaris

Current affairs 05/06/2019
Current affairs 05/06/2019

1). Comptroller and auditor general Rajiv Mehrishi has been appointed as the external auditors of World Health Organisation (WHO) for a four year term from 2020-23. 2).World Environment Day is observed on 5 June(Theme: The Air Pollution). 3). Madhya Pradesh cabinet has passed a resolution to increase reservation of OBC's 27%.

करंट अफेयर्स 03-04/06/2019
करंट अफेयर्स 03-04/06/2019

1. नयब बुकेले को ईआई सल्वाडोर के राष्ट्रपति के रूप में चुना गया है। (ईआई सल्वाडोर की राजधानी: सैन सल्वाडोर, मुद्रा: संयुक्त राज्य अमेरिका डॉलर) 2. राष्ट्रीय सुरक्षा सलाहकार (NSA) अजीत डोभाल की दोबारा अपने पद पर नियुक्ति हुई। NDA सरकार के दूसरे कार्यकाल में उन्हें कैबिनेट रैंक दिया गया है। 3. 3 जून को विश्व साइकिल दिवस मनाया जाता है।

Current affairs 03-04/06/2019
Current affairs 03-04/06/2019

1. Nyaib Bukele has been Sworn in as the president of  EI Salvador ( EI Salvador's capital: San Salvador, currency: United States Dollar). 2. National Security Advisor (NSA) Ajit Doval reappointed to his post and given Cabinet rank in the second term of the NDA government. 3. World Bicycle Day is observed on 3rd June .

Current Affairs Quiz

डेली जीके क्विज 17/05/2019
डेली जीके क्विज 17/05/2019

1. भारतीय नौसेना प्रमुख का नाम बताएं? 2. हाल ही में ICC द्वारा पहली महिला मैच रेफरी के रूप में किसे नियुक्त किया गया है? 3. हाल ही में एक हल्के खेल विमान (एलएसए) में अटलांटिक महासागर को पार करने वाली दुनिया की पहली महिला कौन बनी है?

Daily Gk Quiz 17/05/2019
Daily Gk Quiz 17/05/2019

1. Name the Indian Navy Chief? 2. Recently who has been appointed as first female match referee by ICC? 3. Recently who has becomes the world’s first woman to cross the Atlantic Ocean solo in a light sports aircraft (LSA)?

डेली जीके क्विज 29/09/2018
डेली जीके क्विज 29/09/2018

प्रश्न 1)। हाल ही में एशियाई विकास बैंक (एडीबी) ने राज्य में रोजगार को बढ़ावा देने के लिए मध्य प्रदेश में पहला बहु-कौशल पार्क स्थापित करने के लिए 150 मिलियन डॉलर के ऋण को मंजूरी दे दी है। एडीबी के अध्यक्ष कौन हैं? प्रश्न 2)। परकर्म परव किस अवसर पर मनाया जा रहा है? प्रश्न 3)। भारत की लाइव स्टॉक जनगणना 1 अक्टूबर से शुरू होने वाली है। इस तरह की कितनी जनगणना पहले आयोजित की गई है और यह कौन सी जनगणना है?