Question

Hi. Please answer 1-4 and show work. Thank you! :)

1. An object is placed along the axis of a concave mirror halfway between its focus and center. In terms of the focal length f, how far from the mirror is the image?

a. 2f/3

b. 3f/2

c. 2f

d. 3f

2. An object is placed 10cm from a concave mirror; the image is virtual and three times the size of the object. What is the focal length of the mirror?

a. 7.5cm

b. 15cm

c. 20cm

d. 30cm

3. A convex with power 4D is used to create a real image that is the twice the size of the object. Calculate the image's distance from the lens

a. 6 cm

b. 12cm

c. 37.5cm

d. 75cm

4. A light bulb is placed 12m in front of a diverging mirror with focus 6m. What happens if a light bulb is placed 6m in front of the mirror?

a. An image is formed 6 m behind the mirror

b. An image is formed 3m behind the mirror

c. An image is formed 6m in front of the mirror

d. No image is formed and the rays end up traveling parallel to infinity

Answer 1