1. If when an object is placed 25.1cm in front of a mirror the image is located 12 cm behind the mirror, determine the f
Posted: Mon May 16, 2022 5:55 pm
1. If when an object is placed 25.1cm in front of a mirror the
image is located 12 cm behind the mirror, determine the focal
length of the mirror.
Is the mirror in the previous question convex or concave?
2. What is the focal length of 1.51 D reading glasses found
on the rack in a drugstore?
3. You place an object 27.42 cm in front of a diverging
lens which has a focal length with a magnitude of 10.34 cm, but the
image formed is larger than you want it to be. Determine how
far in front of the lens the object should be placed in order to
produce an image that is reduced by a factor of 2.9.
4. You have enrolled in a scuba diving class and while
swimming under water in a nearby lake you look up and note that the
Sun appears to be at an angle of 19.742° from the vertical. At what
angle above the horizon does the diving instructor standing on
shore see the Sun?
5. As shown in the figure, a light beam travels from air,
through an unknown substance, and then into water. If the angle of
incidence θ1 is 10.1, and the index of refraction
of the unknown substance is 1.31, determine the angle with which
the ray of light will be refracted when it reaches the water,
θ3. Assume that the index of refraction of water is 1.33.
6. Citizen's band (CB) radio utilizes frequencies between
commercial AM and FM. What is the frequency of an 14.26 m
wavelength CB channel?
7. The helium-neon lasers most commonly used in student
physics laboratories have average power outputs of 0.250 mW.
If such a laser beam is projected onto a circular spot 7.728 mm in
diameter, what is its intensity?
8. A laser beam has an intensity of 8.365 W/m2.
What is the amplitude of the electric field?
9.An electromanetic field has a wave function given by the
expression E=5.56cos(2π3x−1×108t)
What is the amplitude of this wave?What is the wavelength of
this wave?
What is the frequency of this wave? Give your answer in MHz
image is located 12 cm behind the mirror, determine the focal
length of the mirror.
Is the mirror in the previous question convex or concave?
2. What is the focal length of 1.51 D reading glasses found
on the rack in a drugstore?
3. You place an object 27.42 cm in front of a diverging
lens which has a focal length with a magnitude of 10.34 cm, but the
image formed is larger than you want it to be. Determine how
far in front of the lens the object should be placed in order to
produce an image that is reduced by a factor of 2.9.
4. You have enrolled in a scuba diving class and while
swimming under water in a nearby lake you look up and note that the
Sun appears to be at an angle of 19.742° from the vertical. At what
angle above the horizon does the diving instructor standing on
shore see the Sun?
5. As shown in the figure, a light beam travels from air,
through an unknown substance, and then into water. If the angle of
incidence θ1 is 10.1, and the index of refraction
of the unknown substance is 1.31, determine the angle with which
the ray of light will be refracted when it reaches the water,
θ3. Assume that the index of refraction of water is 1.33.
6. Citizen's band (CB) radio utilizes frequencies between
commercial AM and FM. What is the frequency of an 14.26 m
wavelength CB channel?
7. The helium-neon lasers most commonly used in student
physics laboratories have average power outputs of 0.250 mW.
If such a laser beam is projected onto a circular spot 7.728 mm in
diameter, what is its intensity?
8. A laser beam has an intensity of 8.365 W/m2.
What is the amplitude of the electric field?
9.An electromanetic field has a wave function given by the
expression E=5.56cos(2π3x−1×108t)
What is the amplitude of this wave?What is the wavelength of
this wave?
What is the frequency of this wave? Give your answer in MHz