Photoelectric effect, black body radiation

What is the relation between the interaction parameter, ‘b’, and atomic radius, R, for the Photoelectric effect?

• b > R

• b ≈ R

• b < R

• no relation between b and R

How does the intensity affect the photoelectric current?

• As the intensity decreases, the photoelectric effect becomes twice

• As the intensity increases, the photoelectric effect decreases

• As intensity increases, the photoelectric effect increases

• No effect

The photoelectric emission could be explained by the ____________

• Wave nature of light

• Particle nature of light

• Dual nature of light

• Quantum nature

• v1 > v2 > v3

• v2 > v3 > v1

• v3 > v2 > v1

• v1 > v3 > v2

On which part of the photoelectric cell does the radiation strikes?

• Cathode

• Anode

• Ammeter

• Radiation does not strike on the photoelectric cell

Planck proposed that the vibrational energies of the atoms are quantized

• true

• false

Blackbody spectrum depends on

• wavelength

• temperature

• time

Light can be behave as both a particle and a wave

• true

• false

As the wavelength of the radiation decreases, the intensity of the black body radiation...

• Increases

• Decreases

• First increases then decreases

• First decreases then increases

The radiations emitted by hot bodies are called_____

• X-rays

• Gamma radiations

• Visible light

• Black-body radiation