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Ms Eccentric
Subject: Chemistry
, asked on 24/5/18
Violet light produces high energy ? Am i right ?
Answer
2
Ayan
Subject: Chemistry
, asked on 23/5/18
cathode rays have---
(a) mass only
(b) charge only
(c)no mass no charge
(d) mass and charge both
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
Explain:
Answer
2
Deisha Gupta
Subject: Chemistry
, asked on 22/5/18
Orbital angular momentum depends on ??
Answer
1
Deisha Gupta
Subject: Chemistry
, asked on 22/5/18
Q4. Which of the following statement is not correct about the characteristics of cathode rays?
(i) They start from the cathode and move towards the anode.
(ii) They travel in straight line in the absence of an external electrical or magnetic field.
(iii) Characteristics of cathode rays do not depend upon the material of electrodes in
cathode ray tube.
(iv) Characteristics of cathode rays depend upon the nature of gas present in the cathode ray
tube.
Answer
1
Dipesh Kumar Karesia
Subject: Chemistry
, asked on 20/5/18
WHAT IS THE VALUE OF RYDBERG'S CONSTANT?? SOMEWHERE IT IS 109677 AND 2.18*10^-18 J...PLZ HELP ME FOR THIS CONFUSION
Answer
1
Roshna
Subject: Chemistry
, asked on 19/5/18
calculate the wavelength of a particle of mass 3.1*10^-31kg that is moving with a speed of 2.21*10^7 m/s.(h=6.63*10^-34Js).
Answer
4
Saikrishna Giri
Subject: Chemistry
, asked on 19/5/18
Q 5. In photo electric effect experiment, irradiation of metal with a light of frequency 5.2 x 10
^{14}
s
^{-1}
yields an electron with maximum kinetic energy 1.3 x 10
^{-19}
J. Calculate the threshold frequency
Q 6. The mass of an electron is 9.1 x 10
^{-31}
kg. If its kinetic energy is 3.0 x 10
^{-25}
J, calculate its wavelength.
Q 7. Calculate the wavelength of the radiation emitted producing a line in Lyman series when an electron falls from fourth stationary state in hydrogen spectrum. (R
_{H}
= 1.1 x 10
^{7}
)
Q 8. What are the frequency and the wavelength of a photon emitted during a transition from n = 5 state to n = 2 state in the hydrogen atom?
Q 9. Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen,
Q 10. a) What is the relationship between wavelength and momentum?
b) Calculate de-Broglie wavelength associated with alpha-particle of energy 7.7 x 10
^{-13}
J and a mass of 6.6 x 10
^{-24}
g.
Q 11. Explain Heisenberg uncertainty principle. On the basis of the above principle, show that electron cannot exist inside the atomic nucleus,
Answer
1
Saikrishna Giri
Subject: Chemistry
, asked on 19/5/18
Q. Please answer the below question.
5. In photo electric effect experiment, irradiation or metal with a light of frequency 5.2 x 10
^{14}
s
^{-1}
yields an electron with maximum kinetic energy 1.3 x 10
^{-19}
J. Calculate the threshold frequency.
6.The mass Of an electron is x 9.1 x 10
^{-31}
kg If its kinetic energy is 3.0 x 10
^{-25}
J calculate its wavelength
7. Calculate the wavelength of the radiation emitted a line in Lyman series when an electron falls from fourth stationary State in hydrogen spectrum. (R
_{H}
= 1.1 x 10
^{7}
)
Answer
1
Saikrishna Giri
Subject: Chemistry
, asked on 19/5/18
Q. Please answer the below question.
Q.9. Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.
Answer
1
Saikrishna Giri
Subject: Chemistry
, asked on 19/5/18
Q. Please answer the below question.
2.
Calculate the energy of a photon of red light having wavelength 650 nm,
3. Calculate the wavelength of the spectral lines of Balmer series when n =3,
4. The energy of the electron in the second and the third orbit of Hydrogen atom is -5.42 x 10-
^{12}
ergs. and -2.41 x 10
^{-12}
ergs, Calculate the wavelength of the emitted radiation when electron drops from 3
^{rd}
to 2
^{nd}
orbit.
Answer
1
Saikrishna Giri
Subject: Chemistry
, asked on 19/5/18
Q. Please answer the below question..
Answer
1
Saikrishna Giri
Subject: Chemistry
, asked on 19/5/18
Q. Please answer the below question.
Answer
1
Saikrishna Giri
Subject: Chemistry
, asked on 19/5/18
Q. Please answer the below question.
$\mathbf{5}\mathbf{.}\mathrm{In}\mathrm{photo}\mathrm{electric}\mathrm{effect}\mathrm{experiment},\mathrm{irradiation}\mathrm{of}\mathrm{metal}\mathrm{with}\mathrm{a}\mathrm{light}\mathrm{of}\mathrm{frequency}5.2\times {10}^{14}{\mathrm{s}}^{-1}\mathrm{yields}\mathrm{an}\mathrm{electron}\mathrm{with}\mathrm{maximum}\mathrm{kinetic}\mathrm{energy}1.3\times {10}^{-19}\mathrm{J}.\mathrm{Calculate}\mathrm{the}\mathrm{threshold}\mathrm{frequency}.$
Answer
1
Dipesh Kumar Karesia
Subject: Chemistry
, asked on 18/5/18
plz derive how wavelength = h/mv.
Answer
1
1
2
3
4
5
Next
What are you looking for?

(a) mass only

(b) charge only

(c)no mass no charge

(d) mass and charge both

(i) They start from the cathode and move towards the anode.

(ii) They travel in straight line in the absence of an external electrical or magnetic field.

(iii) Characteristics of cathode rays do not depend upon the material of electrodes in

cathode ray tube.

(iv) Characteristics of cathode rays depend upon the nature of gas present in the cathode ray

tube.

^{14}s^{-1}yields an electron with maximum kinetic energy 1.3 x 10^{-19}J. Calculate the threshold frequencyQ 6. The mass of an electron is 9.1 x 10

^{-31}kg. If its kinetic energy is 3.0 x 10^{-25}J, calculate its wavelength.Q 7. Calculate the wavelength of the radiation emitted producing a line in Lyman series when an electron falls from fourth stationary state in hydrogen spectrum. (R

_{H}= 1.1 x 10^{7})Q 8. What are the frequency and the wavelength of a photon emitted during a transition from n = 5 state to n = 2 state in the hydrogen atom?

Q 9. Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen,

Q 10. a) What is the relationship between wavelength and momentum?

b) Calculate de-Broglie wavelength associated with alpha-particle of energy 7.7 x 10

^{-13}J and a mass of 6.6 x 10^{-24}g.Q 11. Explain Heisenberg uncertainty principle. On the basis of the above principle, show that electron cannot exist inside the atomic nucleus,

5. In photo electric effect experiment, irradiation or metal with a light of frequency 5.2 x 10

^{14}s^{-1}yields an electron with maximum kinetic energy 1.3 x 10^{-19}J. Calculate the threshold frequency.6.The mass Of an electron is x 9.1 x 10

^{-31}kg If its kinetic energy is 3.0 x 10^{-25}J calculate its wavelength7. Calculate the wavelength of the radiation emitted a line in Lyman series when an electron falls from fourth stationary State in hydrogen spectrum. (R

_{H}= 1.1 x 10^{7})Q.9. Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.

2. Calculate the energy of a photon of red light having wavelength 650 nm,

3. Calculate the wavelength of the spectral lines of Balmer series when n =3,

4. The energy of the electron in the second and the third orbit of Hydrogen atom is -5.42 x 10-

^{12}ergs. and -2.41 x 10^{-12}ergs, Calculate the wavelength of the emitted radiation when electron drops from 3^{rd}to 2^{nd}orbit.$\mathbf{5}\mathbf{.}\mathrm{In}\mathrm{photo}\mathrm{electric}\mathrm{effect}\mathrm{experiment},\mathrm{irradiation}\mathrm{of}\mathrm{metal}\mathrm{with}\mathrm{a}\mathrm{light}\mathrm{of}\mathrm{frequency}5.2\times {10}^{14}{\mathrm{s}}^{-1}\mathrm{yields}\mathrm{an}\mathrm{electron}\mathrm{with}\mathrm{maximum}\mathrm{kinetic}\mathrm{energy}1.3\times {10}^{-19}\mathrm{J}.\mathrm{Calculate}\mathrm{the}\mathrm{threshold}\mathrm{frequency}.$