4 One wavelength of electromagnetic radiation emitted from a mercury vapour lamp is 436 nm.
(1) Calculate the photon energy corresponding to this wavelength.
A. 4.6x10-19 eV
B. 4.6x10-19)
C. 436x10-"')
D. 3.0x10-9 ev
(ii) Data for the work function energies of caesium and tungsten metal are given in Fig. 10.1
metal
work function
energy/eV
caesium
1.4
tungsten
4.5
From which surface will the electrons will be released, when the photon in problem (1) were
incident on the surfaces of cesium and tungsten?
A. Cesium
B. Tungsten
C. Both
D. non

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

happy to

pls mark as brainliest.

it has to be b, about 97 percent.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.