A biconvex lens is one in which both surfaces of the lens bulge outwards. Suppose you had a biconvex lens with radii of curvature with magnitudes of R 1= 10cm and R 2 = 15cm. The lens is made of glass with index of refraction n=1.5. We will employ the convention that R 1 refers to the radius of curvature through wich light will enter the lens, and R 2 refers to the radius of curvature from which the light will exit the lens.Is this lens converging or diverging?
What is the focal length of this lens in air?
Answers
Answer:
The focal length is 12 cm and the lens is converging.
Explanation:
Given that,
Radius, R ₁=10 cm
R₂ =15 cm
Index of refraction n= 1.5
We need to calculate the focal length of the lens
Using formula of focal length
Put the value into the formula
The focal length of the lens is positive so the lens is converging.
Hence, The focal length is 12 cm and the lens is converging.
Final answer:
A biconvex lens is a type of converging lens. Using the Lensmaker's formula and the given values, the focal length of the lens in air is calculated to be 30cm.
Explanation:
A biconvex lens, which is defined by both surfaces of the lens bulging outwards, is a form of converging lens due to its ability to bend parallel light rays toward a single focal point after they pass through the lens. The focal length of the lens can be calculated using the Lensmaker's formula, which is 1/f = (n-1)[(1/R1) - (1/R2)]. Applying the given values, we find that the focal length f = 1/[(1.5-1)[(1/10)-(1/15)]] = 30cm.
Therefore, this biconvex lens is a converging lens with a focal length of 30cm in air.
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Related Questions
The headlights are shining on a truck travelling at 100 km/h. The speed of the light from the headlights relative to the road will be:A) c B) c + 100 km/h C) c – 100 km/h D) depends on the temperature, but faster than the speed if the truck was not moving. E) faster than if the truck was not moving, but impossible to calculate with the given information
A brass washer has an outside diameter of 4.50 cm with a hole of diameter 1.25 cm and is 1.50 mm thick. The density of brass is 8599 kg/m3. If you put this washer on a laboratory balance, what will it "weigh" in grams?
The charge on a gamma ray is ____. a. 2 b. 1 c. 0 d. 2
Charged objects have a _________ charge. A. net B. moving C. positive D. negative
B. a boulder falling off a cliff in a straight path
C. a ball being thrown straight up
D. a bicyclist moving in a straight line at a constant speed
Answers
A. No. The airplane's speed is increasing.
B. No. The boulder's speed increases as it falls.
C. No. The speed of the ball decreases as it approaches the peak,
then it changes direction, begins to move downward, and its speed
increases steadily after that.
D. Yes. The cyclist's speed and direction are not changing.
Final answer:
Accelerated motion refers to any motion with changing velocity, including changes in speed or direction. Most of the examples provided involve accelerated motion, except for the bicyclist moving in a straight line at a constant speed, as both speed and direction remain constant in such scenario.
Explanation:
In the context of physics, accelerated motion refers to any motion in which the velocity changes - either in magnitude (speed) or direction. This can be due to an increase or decrease in speed, or a change in direction. Examples of accelerated motion include an airplane taking off down a straight runway, a boulder falling off a cliff in a straight path, and a ball being thrown straight up.
However, a bicyclist moving in a straight line at a constant speed is NOT an example of accelerated motion. In this case, the speed (magnitude of velocity) and direction are both constant, and therefore there is no acceleration present.
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Answers
Answer:
the acceleration is 2.5 MPH over 12 mins.
Explanation:
30 MPH in 12 minutes=
30/12=
2.5
Answers
Mass (m) = 1200 kg
Distance (s) = 100 m
Time (t) = 10 seconds
Now,
=
= 10 m/s
Note that this one is the final velocity.
We also know that,
initial velocity (u) = 0 m/s .......because the car starts from rest.
Now,
=
=
= 1 m/s²
Now,
Force (F) = mass (m) * acceleration (a)
= 1200 kg * 1 m/s²
= 1200 kg.m/s²
= 1200 N
Now,
Work Done (W) = Force (F) * displacement (s) ....note that displacement is same as distance.
= 1200 N * 100 m
= 120000 N.m
= 120000 J
Now,
Power (P) =
=
= 12000 J/s
= 12000 watt
SO,
A) The acceleration of the car is 1 m/s².
B) 1200 Newton (N) force must have acted on the car.
C) The velocity of the car after 10 seconds is 10 m/s.
D) 120000 Joule (J) work was done on the car.
E) The engine produced a minimum power of 12000 watt.
Answers
Inertia: Objects tend to move at the same speed and direction or, if at rest, stay at rest. A force has to be applied to overcome inertia. An objects inertia is determined by the mass of the object.
Answer:
The law of inertia is mostly known the same as THE NEWTONS FIRST LAW OF MOTION which states that"A body will continue to its state of rest or motion unless acted by an external forces"
●WHAT IS INERTIA?
Inertia is the ability of a body at rest to resist motion or a body in motion to resist resting unless acted by external forces.
△TYPES OF INERTIA
■There are 3 types of inertia,
◎Inertia of rest
◎Inertia of direction
◎Inertia of motion
Answers
Answer:
air speed
Explanation:
took the exam
Answers
...again not sure