1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kenny6666 [7]
3 years ago
11

suppose that you look into a photometer's eyepiece and the fluorescent disks appear to be equal in intensity. If the distance be

tween the photometer to lamp 1 is 400mm, the distance between the photometer to lamp 2 is 200 mm, and the intensity of lamp 2 is known to be 15 candelas, what is the intensity to lamp 1?
Physics
1 answer:
d1i1m1o1n [39]3 years ago
7 0
Use the Inverse square law, Intensity (I) of a light is inversely proportional to the square of the distance(d).

I=1/(d*d)

Let Intensity for lamp 1 is L1 distance be D1 so on, L2 D2 for Intensity for lamp 2 and its distance.

L1/L2=(D2*D2)/(D1*D1)

L1/15=(200*200)/(400*400)
L1=15*0.25
L1=3.75 <span>candela</span>

You might be interested in
Alice suffered a minor electrical shock as she switched on her bathroom light. She is concerned and wants to prevent it from hap
snow_tiger [21]
Get a pull chord light switch installed in her bathroom by a qualified electrician asap. Meanwhile, keep hands as dry as possible, and try not to go near that switch until it's either been properly earthed, or whatever the problem actually is, and get qualified advice on what the problem is. Don't have wet feet either, and don't stand in puddles of water whilst operating - i she has to - the switch. 250V AC mains can be lethal, and at least painful.
7 0
3 years ago
Read 2 more answers
An opera singer breaks a crystal glass with her voice. Which best explains why this occurs? The pitch of her voice matches the p
aalyn [17]

The frequency at which the body vibrates breaks is natural frequency. The glass with her voice because the frequency of her voice matches the natural frequency of the glass.

<h3>What is the natural frequency?</h3>

When there is no external force acting on the body unless the body vibrates is known as the natural frequency of vibration.it is denoted by \rm w_n.

when the frequency of a body matches the natural frequency a condition occurs known as resonance.

To learn more about the natural frequency refer to the link;

brainly.com/question/1123932

3 0
2 years ago
Scientific laws explain_____.
arsen [322]

Howdy! I have your answer:

Scientific laws explain repeated observations that are experimental.

It also describes aspects of the universe.

~sofia

3 0
3 years ago
Perception Distance + Reaction Distance + Braking Distance = _____________.
scZoUnD [109]

Answer:

option B) is correct

Explanation:

perception distance is the distance traveled by  the vehicle when the driver perceive the hazard situation.

reaction distance  is the distance traveled by the vehicle after seeing the hazard situation and reacting to it.

Braking Distance is the distance traveled by the vehicle after applying the brake.

so, the sum of Perception Distance + Reaction Distance + Braking Distance is called the total stopping distance

hence option B) is correct .

4 0
3 years ago
Anorexia nervosa is generally a problem found in young girls.<br><br> True<br> False
garik1379 [7]

Answer:

true

Explanation:

depends on how young it starts usually at age 10 or 12 sometimes 13 are the most common ages to start this

8 0
3 years ago
Other questions:
  • A wave with a wavelength of 0.1 m moves with a speed of 0.5 m/s. What is the frequency of the wave?
    6·1 answer
  • Which type of force pulls objects toward one another
    5·2 answers
  • How Is budding different from fertilization
    5·1 answer
  • Ok i bet none of you guys/girls can get this right there's three states of matter solid
    6·1 answer
  • HURRY!!
    6·2 answers
  • A 0.0663 kg ingot of metal is heated to 241◦C
    9·1 answer
  • Assessment started: undefined.
    8·1 answer
  • The food web for a particular ecosystem is shown below.
    8·2 answers
  • Which statements accurately describe mechanical waves​
    6·1 answer
  • The right to gather to advance some political or social cause is known as
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!