
What is energy in joules of a mole of photon associated with visible light of wavelength of ?
Answer
429k+ views
Hint:In order to solve this question, we need to understand the definition of energy and dual nature of light. Energy is the work capacity of any body or any material, it can get transferred but it can’t be created nor destroyed. Also the dual nature of light tells us that light is made up of packets of photons each having a certain definite amount of energy like in photoelectric effect, Compton effect and blackbody radiation.
Complete step by step answer:
Before proceeding further we need to identify the definition of mole which states that it is the amount of material containing particles. This number is called Avogadro’s number. Also Energy that photon carries is equal to .
Wavelength of light used is
So using relation
So energy of one photon is where
So using energy relation and putting value of frequency we get
So energy of one mole photon is
on putting the values we get,
we can write
Hence the answer is .
Note: It should be remembered that, here Avogadro number denotes number of photons so we multiply one photon energy to total photon number so to get total energy of mole photon. Also it should be remembered that light has dual nature it can be electromagnetic wave or packets of photons and that is totally depends on different process like in photoelectric effect it act as lumps of photons but in conductor it behaves as electromagnetic wave and that is reason why electric field cannot penetrate inside the conductor.
Complete step by step answer:
Before proceeding further we need to identify the definition of
Wavelength of light used is
So using relation
So energy of one photon is
So using energy relation and putting value of frequency we get
So energy of one mole photon is
on putting the values we get,
we can write
Hence the answer is
Note: It should be remembered that, here Avogadro number denotes number of photons so we multiply one photon energy to total photon number so to get total energy of
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 Social Science: Engaging Questions & Answers for Success

Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Physics: Engaging Questions & Answers for Success

Master Class 11 Biology: Engaging Questions & Answers for Success

Trending doubts
Father of Indian ecology is a Prof R Misra b GS Puri class 12 biology CBSE

Who is considered as the Father of Ecology in India class 12 biology CBSE

Enzymes with heme as prosthetic group are a Catalase class 12 biology CBSE

A deep narrow valley with steep sides formed as a result class 12 biology CBSE

An example of ex situ conservation is a Sacred grove class 12 biology CBSE

Why is insulin not administered orally to a diabetic class 12 biology CBSE
