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Light of wavelength 4000 angestrom falls on a photosensitive metal and a negative 2v potential stops the emitted electrons the work function of material in every is approximately. a)1.1. b) 2.0.c) 2.2.d)3.1?plzzz I get confused give solution plzzxxxx?
Most Upvoted Answer
Light of wavelength 4000 angestrom falls on a photosensitive metal and...
Solution:

Given:
- Wavelength of light = 4000 angstrom
- Stopping potential = -2V
- Work function of the material = ?

Formula:
- The energy of the incident light = Work function + Maximum kinetic energy of emitted electron

Calculations:
- Energy of incident light = hc/λ
- Where h = Planck's constant, c = speed of light, and λ = wavelength of light
- Energy of incident light = (6.63 x 10^-34 J s * 3 x 10^8 m/s) / (4000 x 10^-10 m)
- Energy of incident light = 4.97 x 10^-19 J
- Maximum kinetic energy of emitted electron = e * stopping potential
- Where e = charge of electron
- Maximum kinetic energy of emitted electron = 1.6 x 10^-19 C * 2V
- Maximum kinetic energy of emitted electron = 3.2 x 10^-19 J
- Work function = Energy of incident light - Maximum kinetic energy of emitted electron
- Work function = 4.97 x 10^-19 J - 3.2 x 10^-19 J
- Work function = 1.77 x 10^-19 J
Therefore, the work function of the material is approximately 1.77 x 10^-19 J or 1.1 eV.
So, the correct answer is:
a) 1.1
Community Answer
Light of wavelength 4000 angestrom falls on a photosensitive metal and...
Answer is 4.5×10*-13
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Light of wavelength 4000 angestrom falls on a photosensitive metal and a negative 2v potential stops the emitted electrons the work function of material in every is approximately. a)1.1. b) 2.0.c) 2.2.d)3.1?plzzz I get confused give solution plzzxxxx?
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Light of wavelength 4000 angestrom falls on a photosensitive metal and a negative 2v potential stops the emitted electrons the work function of material in every is approximately. a)1.1. b) 2.0.c) 2.2.d)3.1?plzzz I get confused give solution plzzxxxx? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Light of wavelength 4000 angestrom falls on a photosensitive metal and a negative 2v potential stops the emitted electrons the work function of material in every is approximately. a)1.1. b) 2.0.c) 2.2.d)3.1?plzzz I get confused give solution plzzxxxx? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Light of wavelength 4000 angestrom falls on a photosensitive metal and a negative 2v potential stops the emitted electrons the work function of material in every is approximately. a)1.1. b) 2.0.c) 2.2.d)3.1?plzzz I get confused give solution plzzxxxx?.
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