Question

the three sold frequency why zero for a metal is 7.0 into 10 to the power 14 calculate the kinetic energy of electron emitted when a radiation of frequency y equals to 1.0 into 10 to 15 hit the metal

Answer 1

$\huge\boxed{\fcolorbox{violet}{violet}{Answer}}$

Answer 2

Answer:

$\huge{\fbox{\fbox{\bigstar{\mathfrak{\red{Answer}}}}}}$

▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬

K.E ( kinetic energy ) = h ( f - f₀ ) 

h ----- > plank's constant.

f₀ ------> Threshold frequency.

f --------> Frequency .

▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬

 h = 6.626 × 10⁻³⁴

         f₀ = 7× 10¹⁴ Hz

         f = 1 × 10¹⁵ Hz

▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬

K.E = (6.626 ×10⁻³⁴ ) ₓ [ (1 × 10¹⁵)  - (7× 10¹⁴)].

= 1.987 × 10⁻¹⁹ J

$<marquee>★᭄ꦿ᭄ꦿFOLLOW ME★᭄ꦿ᭄ꦿ<marquee>$