MCQ
In photoelectric effect, electrons are ejected from metals,if the incident light has a certain minimum?
- AWavelength.
- ✓Frequency.
- CAmplitude.
- DAngle of incidence.
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Statement $I:$ If screen is moved away from the plane of slits, angular separation of the fringes remains constant.
Statement $II:$ If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.
In the light of the above statements, choose the correct answer from the options given below :