
Which of the following is not a characteristic of Planck’s quantum theory of radiation?
(A)Radiations are associated with energy
(B)Magnitude of energy associated with a quantum is equal to hv
(C)Radiation energy is neither emitted or absorbed continuously
(D)A body can emit less or more than a quantum of energy
Answer
126.3k+ views
Hint: Planck's quantum theory of radiation has certain statements, consider those statements and check whether the options are correct according to that.
Complete step by step answer:
According to Planck’s quantum theory, the smallest amount of energy that can be emitted or absorbed in the form of electromagnetic radiation is known as quantum. The energy of the radiation absorbed or emitted is directly proportional to the frequency ($v$) and inversely proportional to wavelength ($\lambda $)
$E=hv=\dfrac{hc}{\lambda }$
$h$ is Planck’s constant which is equal to 6.626×10-27 erg–sec or 6.626×10-34 J–sec.
When a black body is heated, it emits thermal radiation of various wavelengths or frequencies. To elucidate these radiations, Planck suggests a theory referred to as Planck’s scientific theory. The most points of scientific theory are:
(i) Substances radiate or absorb energy discontinuously within the sort of small packets or bundles of energy.
(ii) The smallest packet of energy is named quantum, within the case of sunshine , the quantum is understood as a photon.
(iii) The energy of a quantum is directly proportional to the frequency of the radiation.
$E=hv$ whereis the frequency of radiation and is $h$ Planck’s constant.
(iv) A body can radiate or absorb energy in integer multiples of a quantum.
Options A: Radiations are associated with energy. This is not the characteristic of Planck’s quantum theory of radiation. Hence option A is the right answer.
Options B: Magnitude of energy associated with a quantum is proportional to the frequency ($v$) and inversely proportional to wavelength ($\lambda $). $E=hv=\dfrac{hc}{\lambda} $
Hence, option b is the characteristic of Planck’s quantum theory of radiation.
Option C: Radiation energy is neither emitted or absorbed continuously but discontinuously in the form of small packets called quanta. Hence, option c is the characteristic of Planck’s quantum theory of radiation.
Option D: A body can absorb or radiate energy in integer multiples of a quantum $hv$, $2hv$, $3hv$ ........ $nhv$where n is that the positive integer. Hence, option d is the characteristic of Planck’s quantum theory of radiation.
Hence, option (A) is not the characteristic of Planck's quantum theory of radiation.
Note:
-If frequency is bigger than threshold frequency: Then ejection occurs and also, kinetic energy is imparted to the ejected electron.
-If frequency is adequate to threshold frequency, then only ejection occurs.
-If frequency is a smaller amount than threshold frequency, then no ejection occurs and no kinetic energy is imparted.
Complete step by step answer:
According to Planck’s quantum theory, the smallest amount of energy that can be emitted or absorbed in the form of electromagnetic radiation is known as quantum. The energy of the radiation absorbed or emitted is directly proportional to the frequency ($v$) and inversely proportional to wavelength ($\lambda $)
$E=hv=\dfrac{hc}{\lambda }$
$h$ is Planck’s constant which is equal to 6.626×10-27 erg–sec or 6.626×10-34 J–sec.
When a black body is heated, it emits thermal radiation of various wavelengths or frequencies. To elucidate these radiations, Planck suggests a theory referred to as Planck’s scientific theory. The most points of scientific theory are:
(i) Substances radiate or absorb energy discontinuously within the sort of small packets or bundles of energy.
(ii) The smallest packet of energy is named quantum, within the case of sunshine , the quantum is understood as a photon.
(iii) The energy of a quantum is directly proportional to the frequency of the radiation.
$E=hv$ whereis the frequency of radiation and is $h$ Planck’s constant.
(iv) A body can radiate or absorb energy in integer multiples of a quantum.
Options A: Radiations are associated with energy. This is not the characteristic of Planck’s quantum theory of radiation. Hence option A is the right answer.
Options B: Magnitude of energy associated with a quantum is proportional to the frequency ($v$) and inversely proportional to wavelength ($\lambda $). $E=hv=\dfrac{hc}{\lambda} $
Hence, option b is the characteristic of Planck’s quantum theory of radiation.
Option C: Radiation energy is neither emitted or absorbed continuously but discontinuously in the form of small packets called quanta. Hence, option c is the characteristic of Planck’s quantum theory of radiation.
Option D: A body can absorb or radiate energy in integer multiples of a quantum $hv$, $2hv$, $3hv$ ........ $nhv$where n is that the positive integer. Hence, option d is the characteristic of Planck’s quantum theory of radiation.
Hence, option (A) is not the characteristic of Planck's quantum theory of radiation.
Note:
-If frequency is bigger than threshold frequency: Then ejection occurs and also, kinetic energy is imparted to the ejected electron.
-If frequency is adequate to threshold frequency, then only ejection occurs.
-If frequency is a smaller amount than threshold frequency, then no ejection occurs and no kinetic energy is imparted.
Recently Updated Pages
JEE Main 2023 (January 30th Shift 2) Maths Question Paper with Answer Key

Know The Difference Between Fluid And Liquid

JEE Main 2022 (July 25th Shift 2) Physics Question Paper with Answer Key

Classification of Elements and Periodicity in Properties Chapter For JEE Main Chemistry

JEE Main 2023 (January 25th Shift 1) Maths Question Paper with Answer Key

JEE Main 2023 (January 24th Shift 2) Chemistry Question Paper with Answer Key

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility & More

JEE Main Login 2045: Step-by-Step Instructions and Details

JEE Main Exam Marking Scheme: Detailed Breakdown of Marks and Negative Marking

JEE Main 2023 January 24 Shift 2 Question Paper with Answer Keys & Solutions

JEE Mains 2025 Correction Window Date (Out) – Check Procedure and Fees Here!

JEE Main Participating Colleges 2024 - A Complete List of Top Colleges

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Chemistry Chapter 7 Redox Reaction

NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics

NCERT Solutions for Class 11 Chemistry Chapter 8 Organic Chemistry

NCERT Solutions for Class 11 Chemistry Chapter 6 Equilibrium

NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrocarbons
