Question

1.A *light day* is the distance light travels in one day.
The planet Neptune is 4.5 x 10^{12} m from the Sun. Which
of these is the approximate distance between the Sun and Neptune in
light days?

2.The rms value of the magnetic field in an electromagnetic wave
is 3.7 x 10^{-5} T. Calculate the maximum value of the
electric field in the wave.

3.A light bulb emits light uniformly in all directions. At a
distance of 0.6 meters from the bulb the **maximum**
strength of the electric field in the light from the bulb is 28.9
N/C. Calculate the **average** power radiated by the
light bulb.

4.An object is placed 6 cm away from a mirror of focal length 11 cm. Calculate the image distance.

5.A woman stands 2.5 meters from a convex mirror with focal length -1.4 meters. If she is 1.7 meters tall, calculate the height of her reflection.

6.A light ray in air is incident onto a liquid surface at 58 degrees. If the refraction angle of the light in the liquid is 31 degrees, calculate the index of refraction of the liquid.

7.The critical angle between a gemstone and air is 30.9 degrees. Which of the following is the speed of light in the gemstone?

8.Light of wavelength 590 nm is shone through a **double
slit**. The angle that locates the third dark fringe is 14.2
degrees. Calculate the angle that locates the first dark
fringe.

9.On the day his daughter is born, Jack leaves her on Earth and departs on a spaceship to travel around the universe at a constant speed of 0.91c. He returns to Earth on the day of his daughter's 7th birthday. Calculate the duration of the trip as measured by Jack.

10.A spaceship travels to Planet X at 0.98c. As measured by the crew of the ship, the distance from Earth to Planet X is 7.5 light years. Calculate the distance between Earth and Planet X as measured on Earth.

Answer #1

1)

Speed of light

Total time in a day

Distance in light day

Answer 2

RMS magnetic field is given

So maximum magnetic field

Maximum electric fiels

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Q1: Light of wavelength 720 nm is shone through a double
slit. The angle that locates the second dark fringe is
10.3 degrees. Calculate the angle that locates the first dark
fringe.
Q2: A woman stands 2.5 meters from a convex mirror with focal
length -1.4 meters. If she is 1.7 meters tall, calculate the height
of her reflection.
Q3: An object is placed 6 cm away from a mirror of focal length
11 cm. Calculate the image distance.

A spaceship travels to Planet X at 0.92c. As measured by the
crew of the ship, the distance from Earth to Planet X is 10.4 light
years. Calculate the distance between Earth and Planet X as
measured on Earth. (Give your answer in light years)

The critical angle between a gemstone and air is 30.9 degrees.
Which of the following is the speed of light in the gemstone?
1.24 x 108 m/s
1.99 x 108 m/s
2.25 x 108 m/s
1.54 x 108 m/s
2.
An object is placed 8 cm away from a mirror of focal length 13
cm. Calculate the image distance.
3. A woman stands 1.8 meters from a convex mirror with focal
length -0.7 meters. If she is 1.6 meters tall,...

Suppose a transparent vessel 25.0 cm long is placed in one arm
of a Michelson interferometer. The vessel initially contains air at
0° C and 1.00 atm. With light of vacuum wavelength 630 nm, the
mirrors are arranged so that a bright spot appears at the center of
the screen. As air is slowly pumped out of the vessel, one of the
mirrors is gradually moved to keep the center region of the screen
bright. The distance the mirror moves...

1. The image distance s' for a flat mirror
Group of answer choices
a. Is always equal to s
b. Is always greater than s
c. Is always less than s
d. Can be greater than, equal to, or less than s
2. Choose all of the following that are true about
refraction
Group of answer choices
Refraction is the bending of light as it goes from one medium to
another
The incident angle and the refracted angle are measured...

6.) A light ray traveling in air, n = 1.0, is incident (angle of
incidence = 45 o ) upon a boundary with another medium,
n = 1.2, therefore, the light ray transmitted into the second
medium is refracted as follows;
a.) transmission angle is less than 45
o
b.) transmission angle is equal to 45
o
c.) transmission angle is greater than 45
o
d.) transmission angle is unknowable
Answer__________
7.) A light beam passes...

Exercises
1. How is the image formed by the mirror different from the
lenses ?
Exercises: Problem Solving
1. The focal point is found 20 cm from a double concave lens
where an object is placed 12 cm. Find the image distance.??
2- A 2.8 cm diameter coin is placed 25 cm from a double concave
lens with focal length of -12 cm. Find the image distance and
diameter of the image??
3. An object that is 8 cm high...

1/ Alpha Centauri A is a star that is remarkably like
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Alpha Centauri A lies at a distence of 4.4 light-years from Earth,
and it has a luminosity of 5.88 x 10^26 W.
Calculate the apparent brightness of Alpha Centauri
A
Suppose you have a light bulb that emits 100 W of
visible light. How far away from you would you need to put that
light bulb in...

1) 2 point charges are separated by a distance of 8 cm. The left
charge is 48 mC and the right charge is -16mC. Using a full sheet
of paper: draw the 2 charges separated by 8cm, centered in the
sheet. (if you are missing a ruler estimate 8cm as ⅓ a paper sheet
length). [6] a) Draw field lines to indicate the electric fields
for this distribution. [4] b) Draw 3 equipotential surfaces, 1
each, that pass: -Through the...

1) Describe an example of each of the following that may be
found of your kitchen: Explain how your choice falls into this
category, and if there is a chemical name or symbol for it, provide
that as well. Provide a photo of your example with your ID card in
it. a) a compound b) a heterogeneous mixture c) an element (symbol)
Moving to the Caves… Lechuguilla Caves specifically. Check out this
picture of crystals of gypsum left behind in...

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