CO4 - CO6 Finals Reviewer

A light ray reflects from a surface. If the angle of incidence is 24°, what is the angle between the reflected ray and the incident ray at the surface?

• 24°

  
  

• 12°

  
  

• 48°

  
  

• 66°

  
  

A small object is encased in an acrylic block (n = 1.5). The object appears to be 4.0 cm below the surface. What is the actual distance of the object below the surface?

• 6.0 cm

  
  

• 5.5 cm

  
  

• 4.0 cm

  
  

• 2.7 cm

  
  

In a camera, the image focused on the film is

• real and upright.

  
  

• real and inverted.

  
  

• virtual and upright.

  
  

• virtual and inverted.

  
  

A convex mirror has a radius of 10 cm. What is its focal length?

• 10 cm

  
  

• 5.0 cm

  
  

• −5.0 cm

  
  

• −10 cm

  
  

A mirror has a focal length −20 cm. If an object is placed 10 cm in front of the mirror, where will the image form?

• 20 cm in front of the mirror

  
  

• 20 cm behind the mirror

  
  

• 6.7 in front of the mirror

  
  

• 6.7 behind the mirror

  
  

A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal length −100 cm. Where is the image formed?

• 80 cm behind the mirror

  
  

• 25 cm behind the mirror

  
  

• 17 cm behind the mirror

  
  

• 17 cm in front of the mirror

  
  

A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal length −100 cm. What is the size of the image formed?

• 5.0 cm

  
  

• 7.2 cm

  
  

• 7.5 cm

  
  

• 30 cm

  
  

A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal length −100 cm. Which of the following describes the image?

• real and inverted

  
  

• real and upright

  
  

• virtual and inverted

  
  

• virtual and upright

  
  

A 9.0 cm object is placed in front of a mirror and the image formed is upright, behind the mirror, and 3.0 cm in size. Which of the following statements is true?

• the magnification is 1/3 and the image is real

  
  

• the magnification is −1/3 and the image is real

  
  

• the magnification is 1/3 and the image is virtual

  
  

• the magnification is −1/3 and the image is virtual

  
  

An object is placed 60 cm in front of a mirror and the image is upright and ¼ the size of the object. What is the focal length of the mirror?

• −12 cm

  
  

• −20 cm

  
  

• −45 cm

  
  

• −75 cm