Question

19. A student conducts an activity using a concave mirror with focal length of 10cm. He placed
the object 15cm from the mirror. Where is the image likely to form?
CH
A. At 6cm behind the mirror
B. At 6cm in front of the mirror
C. At 30 cm behind the mirror
D. At 30 cm in front of the mirror

20. An optical device has been given to a student and he determines its focal length by
focusing the image of the sun on a screen placed 24cm from the device on the same
ne s de as
the sun. Select the correct statement about the device.
A. Convex mirror of focal . ngth 12cm
C. Concave mirror of focal length 24 cin
B. Concave lens of focal length24cm
D. Convex lens of focal length 12 cm​

Answer 1

Answer:

don't no you only explain me

Answer 2

Answer:

Question 19 and Question 20