The energy of an electrmagnetic radiation is 19-875 - 10-13 erg- What is the wave number in cm -1 - h -6-625 - 10-27 erg-Sec- c - 3 - 1010 cm - sec -1A- 1000B- 106C- 100D- 10-000

The correct option is D 10,000 v = E/hc = 19.895 × 10^ 13/6.625 × 10^ 27 × 3 × 10^10 = 10,000 ...

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Standard XII

Physics

Wave Equation of EM Waves

The energy of...

Question

The energy of an electrmagnetic radiation is $19.875 \times 10^{- 13} e r g$ . What is the wave number in $c m^{- 1}$ ? $h$ = $6.625 \times 10^{- 27} e r g . S e c$ ; $c$ = $3 \times 10^{10} c m . s e c^{- 1}$

1000

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10⁶

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100

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10,000

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Solution

The correct option is D
10,000

$¯ ¯ ¯ v = \frac{E}{h c} = \frac{19.895 \times 10^{- 13}}{6.625 \times 10^{- 27} \times 3 \times 10^{10}}$

= $10, 000$

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Similar questions

Q. The energy of electro-magnetic radiation is

19.875 \times 10^{- 13}

erg. What is its wave number in

c m^{- 1} (h = 6.625 \times 10^{- 27} e r g - s; c = 3 \times 10^{10} c m . s^{- 1})

Q. The energy of an electromagnetic radiation is

3 \times 10^{- 12} e r g s

. What is its wavelength in nanometer?(

h

6.625 \times 10^{- 27} e r g . S e c

C

3 \times 10^{10} c m . S e c^{- 1})

The energy of a photon is $3 \times 10^{- 12} e r g s$ . What is its wavelength in nm ? ( $h$ = $6.62 \times 10^{- 27} e r g . S e c$ ; $c$ = $3 \times 10^{10} c m . s^{- 1})$

Q. The energy of a photon is

3 \times 10^{- 12}

ergs. What is its wavelength in nm ?
( h =

6.62 \times 10^{- 27}

ergs,

C = 3 \times 10^{10}

cm/s)

Q. Find the wavelength associated with an electron which has mass

9.1 \times 10^{- 28} g

and is moving with a velocity of

10^{5} c m

{s e c}^{- 1}

. (Given:

h = 6.625 \times 10^{- 27} e r g - s e c

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The energy of an electrmagnetic radiation is 19.875 × 10−13 erg. What is the wave number in cm−1? h = 6.625 × 10−27 erg.Sec; c = 3 × 1010cm.sec−1

The correct option is D 10,000 ¯¯¯v = Ehc = 19.895 × 10−136.625 × 10−27 × 3 × 1010 = 10,000

The energy of an electrmagnetic radiation is $19.875 \times 10^{- 13} e r g$ . What is the wave number in $c m^{- 1}$ ? $h$ = $6.625 \times 10^{- 27} e r g . S e c$ ; $c$ = $3 \times 10^{10} c m . s e c^{- 1}$

The correct option is D
10,000

$¯ ¯ ¯ v = \frac{E}{h c} = \frac{19.895 \times 10^{- 13}}{6.625 \times 10^{- 27} \times 3 \times 10^{10}}$

= $10, 000$