well,he just told the boys and girls things and gave them homework and asked them questions 1. who is talking to whom? 2.who does he refer to ? 3.what job he did ? 4.how does the Listener react to this ?
Answers
Solution :-
First, we have to find the image distance :
\implies \sf \dfrac{- v}{u} =\: \dfrac{3\cancel{h_o}}{\cancel{h_o}}⟹
u
−v
=
h
o
3
h
o
\implies \sf \dfrac{- v}{u} =\: 3⟹
u
−v
=3
By doing cross multiplication we get,
\implies \sf - v =\: 3u⟹−v=3u
\implies \sf \bold{\purple{v =\: - 3u}}⟹v=−3u
Now, we have to find the object distance :
Given :
Image Distance (v) = - 3u
Focal Length (f) = - 20 cm
\longrightarrow \sf \dfrac{1}{- 20} =\: \dfrac{1}{- 3u} + \dfrac{1}{u}⟶
−20
1
=
−3u
1
+
u
1
\longrightarrow \sf \dfrac{1}{- 20} =\: \dfrac{- 1 + 3}{3u}⟶
−20
1
=
3u
−1+3
\longrightarrow \sf \dfrac{1}{- 20} =\: \dfrac{2}{3u}⟶
−20
1
=
3u
2
Answer:
1.Tommy is talking to Margie
2.He refers to the human teacher of old times
3.he taught children things and gave them homework and asked them question.
4.listener was astonished to listen this