MEDIUM
12th ICSE
IMPORTANT
Earn 100

With reference to photoelectric effect, what is meant by threshold wavelength?

Important Questions on Photoelectric Effect

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 7
The photoelectric threshold wavelength for sodium is 6800 Ao. Explain its meaning.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 8
Two metals A and B have work functions 4 eV and 6 eV respectively. Which metal has lower threshold wavelength for photoelectric effect?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 9
Is photoelectric emission possible at all frequencies? Give reason for your answer.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 10
What is meant by 'threshold frequency' in photoelectric effect? Does it depend upon the intensity of incident light?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 11
What is the relation between the work function and the threshold frequency v0 of a metal?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 12
What is cut-off (or stopping) potential?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 13
Define stopping potential. How is it related to the kinetic energy of photoelectrons?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 14
Explain, what is meant by kinetic mass of a photon?