GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Feb 2019, 08:03

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Online GMAT boot camp for FREE

     February 21, 2019

     February 21, 2019

     10:00 PM PST

     11:00 PM PST

    Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.
  • Free GMAT RC Webinar

     February 23, 2019

     February 23, 2019

     07:00 AM PST

     09:00 AM PST

    Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT

The visual phenomenon known as refraction alters the appearance of ob

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

What should be the difficulty level of this question?

  • 65% [13]
  • 35% [7]
  • 0% [0]
Author Message
TAGS:

Hide Tags

 
Senior RC Moderator
User avatar
V
Status: Preparing GMAT
Joined: 02 Nov 2016
Posts: 2248
Location: Pakistan
GPA: 3.39
Premium Member CAT Tests
The visual phenomenon known as refraction alters the appearance of ob  [#permalink]

Show Tags

New post 29 Jan 2019, 08:45
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

96% (01:10) correct 4% (00:54) wrong based on 85 sessions

HideShow timer Statistics

The visual phenomenon known as refraction alters the appearance of objects as they are seen through water. All objects look larger than they actually are, but darker objects appear much more magnified than lighter objects. Hence, a darkly colored pebble on the floor of a swimming pool looks much larger than a white pebble, as long as the two are placed an equal distance from the eye of the viewer.

The conclusion above would be more properly drawn if it were made clear that the

A. darkly colored pebble is assumed to be greater in size than the white pebble

B. darkly colored pebble is assumed to be the same size as the white pebble

C. darkly colored pebble is assumed to be smaller in size than the white pebble

D. pool floor is light in color

E. pool floor is dark in color

Kudos for best explanation

_________________

New Project RC Butler 2019 - Practice 2 RC Passages Everyday
Final days of the GMAT Exam? => All GMAT Flashcards.
This Post Helps = Press +1 Kudos
Best of Luck on the GMAT!!

Intern
Intern
avatar
B
Joined: 30 Dec 2018
Posts: 33
Concentration: International Business, Marketing
Re: The visual phenomenon known as refraction alters the appearance of ob  [#permalink]

Show Tags

New post 29 Jan 2019, 19:38
1
The visual phenomenon known as refraction alters the appearance of objects as they are seen through water. All objects look larger than they actually are, but darker objects appear much more magnified than lighter objects. Hence, a darkly colored pebble on the floor of a swimming pool looks much larger than a white pebble, as long as the two are placed an equal distance from the eye of the viewer.

The conclusion above would be more properly drawn if it were made clear that the

A. darkly colored pebble is assumed to be greater in size than the white pebble- Dark pebble > white pebble- then refraction role is not confirmed


B. darkly colored pebble is assumed to be the same size as the white pebble- differentiate in normal light and refraction

C. darkly colored pebble is assumed to be smaller in size than the white pebble-

D. pool floor is light in color

E. pool floor is dark in color

Answer is B, because if size is same then differentiation is possible
Manager
Manager
User avatar
G
Joined: 31 May 2015
Posts: 105
GMAT ToolKit User
Re: The visual phenomenon known as refraction alters the appearance of ob  [#permalink]

Show Tags

New post 03 Feb 2019, 01:37
It is my opinion that in order for the the sentence to hold " Hence, a darkly colored pebble on the floor of a swimming pool looks much larger than a white pebble, as long as the two are placed an equal distance from the eye of the viewer." we need to make sure both pebbles are the same in size. Same size pebbles are required premise for the refraction mentioned on the discussion to work. If one is larger than the other pebble then it contaminates the refraction observed by human eye.
_________________

GMAT loosers are born not made !!!

Manager
Manager
avatar
B
Joined: 29 Nov 2016
Posts: 96
Re: The visual phenomenon known as refraction alters the appearance of ob  [#permalink]

Show Tags

New post 03 Feb 2019, 02:47
1
The question stem

"The conclusion above would be more properly drawn if it were made clear that the" makes us beleive that this is an assumption question.

Let's find the conclusion:

Dark colour pebble (DP)looks larger than WP given,
1) the viewing distance is same
2) darker objects look larger
3) refraction makes object look bigger.

Now let's look at assumption.

What if the size of WP and DP are actually different. In that case, even if the viewing distance is same the objects will appear different as they actually are different in size.

Hence the assumption is that the two pebbles are equal in size.

Clearly option B is the winner.

Posted from my mobile device
GMAT Club Bot
Re: The visual phenomenon known as refraction alters the appearance of ob   [#permalink] 03 Feb 2019, 02:47
Display posts from previous: Sort by

The visual phenomenon known as refraction alters the appearance of ob

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.