This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: It is desired to project the image of an object four times its actual size using a lens of focal ... (Read 101 times)

Shelles

  • Hero Member
  • *****
  • Posts: 582
on: Jul 29, 2018
It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm. How far from the lens should the object be placed?
 
  A) 100 cm
  B) 80 cm
  C) 4.0 cm
  D) 25 cm
  E) 5.0 cm

Question 2

A fisherman in a stream 39 cm deep looks downward into the water and sees a rock on the stream bed. How deep does the stream appear to the fisherman? The index of refraction of the water is 1.33.
 
  A) 29 cm
  B) 52 cm
  C) 33 cm
  D) 45 cm


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bigsis44

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

A


Shelles

  • Member
  • Posts: 582
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

nanny

  • Member
  • Posts: 313
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Use of fluorescent molecules by Lowenstein and colleagues to determine the size of gap-junction chan Use of fluorescent molecules by Lowenstein and colleagues to determine the size of gap-junction chan
This image shows growing blood vessels in the retina of a mouse This image shows growing blood vessels in the retina of a mouse
All objects in the image are distant galaxies – not stars All objects in the image are distant galaxies – not stars
Ancient Warming Shrunk Horses to Housecat Size Ancient Warming Shrunk Horses to Housecat Size
Europe’s Size and Location Europe’s Size and Location
How do i calulate an object of that is dropped from (g=9.80m/s2) for 5 s before hitting the ... How do i calulate an object of that is dropped from (g=9.80m/s2) for 5 s before hitting the ...
Video: Neurotransmission at chemical synapses & Excitory and inhibitory potentials

For a complete list of videos, visit our video library