Dual Nature of ...

A cesium photo cell, with a steady potential difference of $$60$$ volt across it, is illuminated by a small bright light placed $$50$$ cm away. When the same light is placed one meter away, the photoelectrons emerging from the photo cell : (assume that potential difference applied is sufficient to produce saturation current)

A free particle with initial kinetic energy $$E$$ and de-broglie wavelength $$\lambda$$ enters a region in which it has potential energy $$U$$. What is the particle's new de-Broglie wavelength?

The De-Broglie wavelength associated with electrons revolving round the nucleus in a hydrogen atom in ground state, will be-

The ratio of $$d-$$Broglie wavelength of molecular of hydrogen and oxygen kept in two vessels separately at $$27^oC$$ and $$127^oC$$ respectively is:

Which of the following figures represent the variation of particle momentum and the associated de-Broglie wavelength?

A body of mass $$m$$ is dropped freely from a height $$h$$. The de-Broglie wavelength of the body as it reaches the ground is:

 what is the angular momentum of an electron of de$$-$$broglie wavelength $$\lambda ?$$ given $$r$$ is the radius of orbit$$.$$

According to de Broglie, wavelength of electron in second orbit is $$10^{-9}$$ meter. Then the circumference of orbit is :-

Stopping potential $$(V_0)$$ frequency $$(v)$$ of radiation graph for three different emitter surfaces $$A, B$$ and $$C$$ as shown in figure, then 
(a) threshold frequency of $$A < B <C$$ 
(b) work function of $$A < B <C$$ 
(c) work function of $$A = B = C$$
(d) threshold wavelength of $$A < B <C$$ 
(e) ratio of the slopes of $$A , B, C$$ id $$1 : 1 : 1$$