Optics Pretest

Compared to the object in front the lens, its image is.....

• inverted and smaller
• inverted and larger
• not inverted and smaller
• not inverted and larger

A 25.0 m object is placed 30.0 m from a convex lens, which has a focal length of 5.0 m. What is the distance of the image?

• 6 m

• 7 m

• 8 m

• 9 m

Which type of lens is thick in the middle, is used to correct farsightedness, and refracts the light causing the image to be pulled in forward to the retina?

• convex lens

• concave lens

Which type of lens is thin in the middle, is used to correct nearsightedness, and spreads out the light which pushes the image back to the retina?

• convex lens

• concave lens

Which one is a convex lens?

• A
• B

The process of light bouncing off a surface

• refraction

• reflection

• diffraction

• diffusion

The point where the rays meet is known as....

• Fire
• the focal point
• refraction
• Plane of the lens

This image is...

• Inverted and smaller
• inverted and bigger
• not inverted and smaller
• not inverted and bigger

Which ray diagram is correct for convex lens?

• 
• 
• 
• 

Which of the diagram shows the correct refraction of light ray after passing through a concave lens?

• 
• 
• 
•