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Can any one send me some formulas of modern physics used for neet?
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Can any one send me some formulas of modern physics used for neet?
Modern physics is a branch of physics which deals with the post-Newtonian concepts in the world of physics. It is based on the two major breakthroughs of the twentieth century: Relativity and Quantum Mechanics.
1. The work function is minimum for caesium (1.9 eV)
2. Work function W = hv0 = hc/λ0
3. Photo effect is directly proportional to the incident radiation
4. Photoelectrons ejected from metal have kinetic energies ranging from 0 to KEmax
Here KEmax = eVs
5. Stopping potential (Vs ) is independent of the intensity of light
6. The intensity in terms of an electric field is given by
I = � Є0E2C
7. The momentum of one photon is h/λ
8. Einstein equation for the photoelectric effect
hv = w0 + KEmax
9. De Broglie wavelength
λ = h/mv = h/p
10. Radius and speed of the electron in hydrogen-like atoms
rn = (n2/Z )a0
a0 = 0.529 �
vn = (Z/n) v0
v0 = 2.19 x 106 m/s
11. Energy in nth orbit
En = E1.(Z2/n2)
E1 = -13.6 eV
12. Wavelength corresponding to spectral lines
1/λ = R [1/n12 – 1/n22]
For layman series n1 = 1 n2= 2,3,4…..
Balmer series n1 = 2 n2= 3,4, 5…..
Paschen n1= 3 n2 = 4,5,6….
The Lyman series is in ultraviolet and Paschen, Brackett, Pfund series in the infrared region
13. If the effect of nucleus motion is considered
rn=(0.529 �) (n2/Z) (m/μ)
En= (-13.6 eV) (Z2/n2)(μ/m)
μ is the reduced mass
14. Minimum wavelength for x-rays
λmin = hc/eV0 = 12400/V0 �
15. Moseley’s Law
√v = a(z – b)
a and b are positive constants
16. Average radius of the nucleus may be written as
R = R0A1/3
R0 = 1.1 x 10-15 M
A – mass number
17. Binding energy of nucleus of mass M is given by
B = (ZMp + NMN – M)C2
18. Alpha decay process
zXA ➡️ z-2 Y A-4 + 2He4
Q value = [m(zXA) – m(z-2 Y A-4) -m(2He4)]C2
19. Beta-minus decay
zXA ➡️ z+1 Y A + β– + v–
Q value = [m(zXA) – m(z+1 Y A)]C2
Beta plus decay
zXA ➡️ z-1 Y A + β+ + v
Q value = [m(zXA) – m(z-1 Y A) – 2me)]C2
20. Electron capture
zXA + e ➡️ z-1 Y A + v
Q value = [m(zXA) – m(z-1 Y A)]c2
21. In radioactive decay, the number of nuclei at an instant is given by N = N0 e-λt
22. Activity of sample A = A0e-λt
23. Activity per unit mass are called specific activity
24. Half life T1/2 = 0.693/λ
25. Average life Tav= T1/2 /0.693
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Can any one send me some formulas of modern physics used for neet?
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Can any one send me some formulas of modern physics used for neet?
Yes available with PDF but sorry aa hi nhi pa rha photu hi nhi sand ho RHA.
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Can any one send me some formulas of modern physics used for neet? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Can any one send me some formulas of modern physics used for neet? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Can any one send me some formulas of modern physics used for neet?.
Can any one send me some formulas of modern physics used for neet? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Can any one send me some formulas of modern physics used for neet? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Can any one send me some formulas of modern physics used for neet?.
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