« previous next »

Author Question: Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his eyes. ... (Read 62 times)

pepyto

  • Hero Member
  • *****
  • Posts: 547
on: Jul 29, 2018
Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his eyes. What should be the focal length of his contact lenses to allow him to read the magazine comfortably at a distance of 30 cm?
 
  A) -30 cm
  B) +30 cm
  C) -60 cm
  D) +60 cm
  E) +90 cm

Question 2

Light enters glass from air. The angle of refraction will be
 
  A) greater than the angle of incidence.
  B) equal to the angle of incidence.
  C) less than the angle of incidence.
Physics ¦ Walker ¦ 5th Edition
Buy Test-Bank


DHRUVSHAH

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

D

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

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.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Mosquito Eyes Up Close: Electron Microscope Image Creates Stunning View Of Insect Mosquito Eyes Up Close: Electron Microscope Image Creates Stunning View Of Insect
Older adults may grieve intensely over the loss of a person or situation that has been a part of the Older adults may grieve intensely over the loss of a person or situation that has been a part of the
Exophthalmos. The protrusion of the eyes is a common symptom of hyperthyroidism. Exophthalmos. The protrusion of the eyes is a common symptom of hyperthyroidism.
In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th
A person with a defective "P" gene might only have it effect the EYES A person with a defective "P" gene might only have it effect the EYES
It is difficult to capture the anguish of the children of divorce, but when I read these lines by ... It is difficult to capture the anguish of the children of divorce, but when I read these lines by ...
Video: Pores and Ion Channels

For a complete list of videos, visit our video library