Author Question: A compound microscope has a 18-cm-long barrel and an objective lens with a focal length of 8.0 mm. ... (Read 98 times)

burton19126

  • Hero Member
  • *****
  • Posts: 532
A compound microscope has a 18-cm-long barrel and an objective lens with a focal length of 8.0 mm.
 
  What is the focal length of the eyepiece to give a total magnification of 240? It is adjusted for minimum eyestrain for persons with a near point of 25 cm. A) 1.3 m
  B) 1.5 cm
  C) 1.9 cm
  D) 2.1 cm
  E) 2.3 cm

Question 2

If you stand in front of a convex mirror, at the same distance from it as its radius of curvature,
 
  A) you will see your image and it will be the same size as you except upside down.
  B) you won't see your image because it is focused at infinity.
  C) you will see your image and you will appear larger than you.
  D) you will see your image and you will appear smaller than you.
  E) you won't see your image because there is none.


dajones82

  • Sr. Member
  • ****
  • Posts: 359
Answer to Question 1

D

Answer to Question 2

D



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

For a complete list of videos, visit our video library