Question

A pencil is located 15 cm from a concave lens with a focal length of 30 cm. Where is the image located?
A. -10 cm
B. 30 cm
C. 10 cm
D. -30

Answer 1

I think it is A?

Answer 2

use the same formula, this time take f=-30

Answer 3

so then A?

Answer 4

\(\huge \sf \frac{1}{-30}=\frac{1}{-15}+\frac{1}{v}\), now find V

Answer 5

are you even sure that they are negatives cause their not negatives in the problem?

Answer 6

They will never give u in the problem. You will have to put the negative/positive sign according to cartesian sign convention by urself

Answer 7

So C?

Answer 8

u solved the equation ?

Answer 9

i think so?

Answer 10

\(\huge \sf \frac{1}{-30}=\frac{1}{-15}+\frac{1}{v}\),

\(\huge \sf \frac{1}{-30}+\frac{1}{15}=+\frac{1}{v}\),

\(\huge \sf \frac{2-1}{30}=+\frac{1}{v}\),

Answer 11

So, V= ?

Answer 12

B?

Answer 13

\(\huge\checkmark\)

Answer 14

thanks (:

Answer 15

\(\color{red}{\huge\bigstar}\huge\text{You're Most Welcome! }\color{red}\bigstar\)
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