Physics Ray Optics Level: Misc Level
A convex lens is placed on a flat glass plate and illuminated from above with monochromatic red light. When viewed from above, concentric bands of red and dark are observed. What does one observe at the exact center of the lens where the lens and the glass plate are in direct contact?
a.A rainbow of color
b.A dark spot
c.A bright red spot
d.A bright spot that is some color other than red
Physics Ray Optics Level: Misc Level
The radius of curvature of a spherical mirror is 32 cm. Rays parallel to the axis of the mirror will be brought into focus at a point that is what distance from th mirror?
a.8.0 cm
b.4.0 cm
c.32 cm
d. 16 cm
Physics Ray Optics Level: Misc Level
A light meter reads 2000 Ix when aimed at a point light source from a distance of 10 cm. What will it read when placed 80 cm from the source and aimed at the source?
Physics Ray Optics Level: Misc Level
All the light from a bulb is focused onto a wall. The lighted area is 600 cm2. The bulb emits a total luminous flux of 3000 Im. What is the illuminance at the wall?
Physics Ray Optics Level: Misc Level
Find the intensity of the Sun,s radiation at the planet Mercury. The distance of this planet from the Sun is 5.8x10 to the 10th m. Given the following:The intensity of the Sun,s radiation at the position of the Earth is 1340 W/m2. The earth to sun distance is 1.5x10 to the 11 th m.
Physics Ray Optics Level: Misc Level
How much luminous flux does a 40-cd isotropic point source emit?
Physics Ray Optics Level: Misc Level
How much flux does a bulb emit if its mean spherical luminous intensity is 40 cd?
Physics Ray Optics Level: Misc Level
A 5.0cm diameter light bulb hangs 1.50 m above a tabletop. Directly below the bulb is a pinhole through the very thin surface of the table. Find the diameter of the image formed of the bulb on the floor, 80 cm beneath the table.
Physics Ray Optics Level: Misc Level
We have seen that two monochromatic light waves can interfere constructively of destructively ,depending on their phase differce. One consequence of this phenomena is:
Physics Ray Optics Level: Misc Level
A convex lens is placed on a flat grass plate and illuminated from above with monochromatic red light.When viewed from above, concentric bands of rd and dark are observed. What does one observe at the exact center of the lens where the lens and glass plate are in direct contact?
Physics Ray Optics Level: Misc Level
The property of light by which it blends around small objects if called:
Physics Ray Optics Level: Misc Level
Light will almost always travel from one place to another along a path of least a. distance b. time c.effort d.expense e.complication
Physics Ray Optics Level: Misc Level
Your weed -cutter requires, as fuel, a gas -to oil mixture of 20-to-1(20 parts of gas mixed with one part of oil). You have 1/3 of a gallon of gas. How much oil, in gallons, should you add to make it all into fuel for the weed- cutter?
a. 1/3
b. 1/30
c. 3
d. 1/60
Physics Ray Optics Level: Misc Level
A certain metel surface emits electrons when lightis shone on it.(a) How can the number of electrons per second be increased?(b) How can the energies of the electrons be increased?
Physics Ray Optics Level: Misc Level
If 1 kg of radium (half-life= 1600 years) is sealed into a container, how much of it willremain as radium after 1600 years? After 4800 years? If the container is opened after a period of time , what would you expect to find inside it?
