The photoelectric effect proves that

light travels in the form of quanta

light travels in the form of transverse waves

Which of these statements is true regarding photoelectric emission?

Number of photoelectrons ejected per second is directly proportional to intensity of incident light provided the frequency of incident light is greater than threshold frequency

Number of photoelectrons ejected per second is inversely proportional to intensity of incident light provided the frequency of incident light is greater than threshold frequency

Number of photoelectrons ejected per second is directly proportional to intensity of incident light provided the frequency of incident light is smaller than threshold frequency

Number of photoelectrons ejected per second is inversely proportional to intensity of incident light provided the frequency of incident light is smaller than threshold frequency

E M B I B E

Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 45

EASY

NEET

IMPORTANT

Earn 100

When the wavelength of radiation falling on a metal is changed from $500 nm to 200 nm$ , the maximum kinetic energy of the photoelectrons becomes three times larger. The work function of the metal is close to:

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Important Questions on Dual Nature of Matter and Radiation

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 46

The maximum velocity of the photoelectron emitted by the metal surface is

v

. Charge and mass of the photoelectron is denoted by

e

and

m

respectively. The stopping potential in volt is

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 47

Threshold frequency for a metal is

15 \times 10^{14} Hz

. The light of wavelength

6000 Å

falls on the metal surface. Which one of the following statements is correct? [velocity of light,

c = 3 \times 10^{8} m s^{- 1}

]

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 48

The photoelectric threshold for a certain metal surface is $360 Å$ . If the metal surface is irradiated by a wavelength of $1100 Å$ , the kinetic energy of the emitted photoelectrons is

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 49

A beam of photons with an energy of