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Normal 0false false falseEN-US X-NONE X-NONEThe work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einsteins equation, the metals which will emit photoelectrons for a radiation of wavelength 4100 Å is/are(a) None(b) A only(c) A and B only(d) All three metals/* Style Definitions */table.MsoNormalTable{mso-style-name:Table Normal;mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-parent:;mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin-top:0in;mso-para-margin-right:0in;mso-para-margin-bottom:10.0pt;mso-para-margin-left:0in;line-height:115%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:Calibri,sans-serif;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Times New Roman;mso-bidi-theme-font:minor-bidi;}

Hrishant Goswami , 11 Years ago
Grade 10
anser 5 Answers
Aditi Chauhan

Last Activity: 11 Years ago

(a)

100 g will become 25 g in two half lives so it is 3200 years.

Aditi Chauhan

Last Activity: 11 Years ago

So, only metals having work function less than 3eV can emit photoelectrons for the incident radiation of wavelength 4100 Å.

Madhukar Thalore

Last Activity: 11 Years ago

we know that E=hc/lambda

now from given data 1eV=1-6*10^-19 J.

now find E value(which will be 3eV) and those having (A,B,C) energy greater than E will show.

Answer is (c) A and B only.

Varun Acharya

Last Activity: 11 Years ago

c

mohammad

Last Activity: 10 Years ago

answer is (c)

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