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`        WRITE BRIEFLY ON THE FOLLOWING WITH EXAMPLES.1. Dual Nature of Matter 2. Wave Properties of Matter 3. The Periodic Table2a. Which element is unlikely to reacts with others? (2b). Which Element will react to form convalent compounds? (2c). Which element will reacts to form an electrovalent compound?`
8 months ago

Arun
13852 Points
```							Dear student Please ask one question in one threadIn case of light some phenomenon like diffraction and interference can be explained on the basis of its wave character. However, the certain other phenomenon such as black body radiation and photoelectric effect can be explained only on the basis of its particle nature. Thus, light is said to have a dual character. Such studies on light were made by Einstein in 1905. Louis de Broglie, in 1924 extended the idea of photons to material particles such as electron and he proposed that matter also has a dual character-as wave and as particle. Derivation of de-Broglie EquationThe wavelength of the wave associated with any material particle was calculated by analogy with photon.In case of photon, if it is assumed to have wave character, its energy is given byE = hv   …(i)(According to the Planck’s quantum theory)Where nth frequency of the wave and ‘h’ is is Planck’s constantIf the photon is supposed to have particle character, its energy is given byE = mc2   ….… (ii)(according to Einstein’s equation)where ‘m’ is the mass of photon, ‘c’ is the velocity of light.By equating (i) and (ii) hv = mc2But v = c/λh c/λ   = mc2(or) λ = h /mcThe above equation is applicable to material particle if the mass and velocity of photon is replaced by the mass and velocity of material particle. Thus for any material particle like electron.λ = h/mv   or λ =  where mv = p is the momentum of the particle.
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8 months ago
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## COUPON CODE: SELF10

### Course Features

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### Course Features

• 70 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions