Question

Follow the adjacent diagram and answer question number 5 to 8.


5. If image distance = -15 cm, identify the type of the mirror used here and find its focal length. ...2
6. If image distance = +15 cm, identify the type of the mirror used here and find its focal length. ...2
7. If image distance = +10 cm, identify the type of the mirror used here and find its focal length. ...2
8. If image distance = - 30 cm, identify the type of the mirror used here and find its focal length. ...2

Answer 1

Answer:

5).

Explanation:

5) u = 15cm, v = -15cm

Therefore,

1/u - 1/v= 1/f

=> 1/15 - 1/-15 = 1/f

=> 1/15 + 1/15 = 1/f

=> 1+1/15 = 1/f

=> 2/15 = 1/f

2F = 15, F = 15/2 = 7.5cm.

Answer 2

Answer:follow attachment

Explanation:7th isconvex