Dual Nature Of Matter & Radiation

Question 1

What did JJ thompson discover

Answer 1

E/M=1.76×10¹¹
E-charge of e
M-mass of e

Question 2

What did oil drop experiment discover

Answer 2

E=1.6×10-¹⁹
Therfore
M=9.1×10-³¹

Question 3

Diffrent type of electronic emissions

Answer 3

1)Thermionic
2)Secondary
3)Field
4)PhotoElectric

Question 4

What is work function

Answer 4

Min energy required to eject an e from a metal surface

Question 5

Work function equation

Answer 5

Φ₀=hν₀

Question 6

Equation of energy using ν

Answer 6

E=hν

Question 7

ν

Answer 7

Provided Frequency

Question 8

ν₀

Answer 8

Minimum frequency required for ejection
•Threshold frequency

Question 9

Relation btw ν and λ

Answer 9

λ = 1/ν

Question 10

Relation btw ν & ν₀

Answer 10

ν>ν₀

Question 11

Relation btw λ & λ₀

Answer 11

λ<λ₀

Question 12

Energy using λ

Answer 12

E=hc/λ

Question 13

λ₀

Answer 13

Maximum wavelength up to which emission of e takes place

Question 14

Lowest work function

Answer 14

Cs — 2.14 eV

Question 15

Highest work function

Answer 15

Pt — 5.65 eV

Question 16

Relatio of ν & λ wiht diffrent Wavelength

Answer 16

G X U V I M R
——————>
ν↓ λ↑

Question 17

E eqn using λ

Answer 17

E=1240/λ_nm

Question 18

Wavelength of red light

Answer 18

200nm

Question 19

Wavelength of Violet

Answer 19

400nm

Question 20

Relation btw work function and temperature

Answer 20

Φ₀ = 1/T

Question 21

e ejected during photoelectric effect is called

Answer 21

Photo electron

Question 22

Relation btw intesity of light and current generated

Answer 22

I = I_p

Question 23

Maximum value of current

Answer 23

Saturated current

Question 24

–ve potential to make i_p 0 is called

Answer 24

Stopping Potential V₀

Question 25

ν Constant In increased↑

Answer 25

Same ν₀ I₃>I₂>I₁

Question 26

ν Increase I constant

Answer 26

V₀3>V₀2>V₀1

Question 27

Laws of Photoelectric effect 1

Answer 27

1) There must be ν₀ before which no photo electric effect takes place

Question 28

Law of Photoelectric 2

Answer 28

I of incident light ↑ & no of e ejected ↑& i_p↑

Question 29

Law of photo electric effect 3

Answer 29

Collision & Ejejction are spontaneous & instantaneous

Question 30

Relation btw KE & ν

Answer 30

1/2mv_max² = eV₀

Question 31

Classical wave theory & its failures 1

Answer 31

📈 I↑= A²↑Therfore KE of ejected e ↑ 📉ν↑ KE ↑

Question 32

Classical wave theory & its failures 2

Answer 32

📈ν ↑ then i_p↑ 📉I↑i_p↑

Question 33

Classical wave theory 3

Answer 33

📈ν of a light is said it is distributed thrughout the different es therfore it takes long time 📉ejection of e takes place instantly

Question 34

Einstein's explanation of photoelectric effect

Answer 34

According to quantum theory , light cosist of small packets called photon having energy (hν)

Question 35

Photon

Answer 35

Light consist of small packets of energy (hν)

Question 36

Who found photons

Answer 36

Max Plank

Question 37

Characteristics of photon 1

Answer 37

Chargeless

Question 38

Characteristics of photon

Answer 38

Rest mass = 0

Question 39

Momentum of light

Answer 39

P=h/λ