Question

A particle of mass 1 mg has the same wavelength
as an electron moving with a velocity of
3 x 106 ms-1. The velocity of the particle is (mass
of electron = 9.1 x 10-31 kg)
(AIPMT (Prelims)-2008

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Answer 1

Answer:

$\huge{\underline{\overline{\color{darkblue}{\bf{\mid{♡AngelicDoll♡}\mid}}}}}$

Wavelength of a particle is given by

$λ_{e}{=}$$\frac{h}{p_{e}}$

${λ}{=}{λ_{e}}$

${p}{=}{p_{e}}$

${mv}{=}{m_{e}}{v_{e}}$

${v}{=}{m_{e}}{v_{e}}$

$\bf\pink{Putting~under~given~data}$

$m_{e}{=}{9.1}\times{10}^{-31}{kg}{,}{v_{e}}{=}{3}\times{10}^{6~m/s}$

${m}{=}{1}{mg}{=}{1}\times{10}^{-6}{kg}$

${v}{=}$${9.1}\times{10}^{-31}\times{3}\times{10}^{6}} \\ {/}{1}\times{10}^{-6}}}$

$\pink{divide}$

${=}{2}{-}\times{10}^{-18}{ms}^{-1}$

$<marquee>$

$\huge\red{AngelicDoll..!!!}$

Answer 2

Answer:

above

Explanation:

above above above above above above