Physics Ray Optics Level: High School
Consider an oil film (n = 1.50 ) on water (n = 1.33 ) and light of wavelength 600 nm in air, incident on the film . The minimum film thickness for constructive interference of the light in air is :
Physics Heat & Thermodynamics Level: High School
Consider a flat steel plate with a hole through its center . When the plates temperature is decreased, the hole will .a . contract only if it takes up more than half the plate’s surface area.
b . expand if it takes up less than half the plate’s surface area.
c . contract.
d . expand.
Physics Heat & Thermodynamics Level: High School
By how much will a slab of concrete 18 m long contract when the temperature drops from a 24A^oC to -16A^oC ? (The coefficient of linear thermal expansion for concrete is 10^-5 per degree C. )
Physics Properties Of Matter Level: High School
Both the pressure and volume of a given sample of an ideal gas double . This means that its temperature in Kelvins must .a. quadruple .
b. reduce to one-half its original value .
c. remain unchanged .
d. reduce to one-fourth its original value .
e. double .
Physics Properties Of Matter Level: High School
Properties of material
The weight that will cause a wire of diameter d to stretch a given distance, for a fixed length of wire, isa. proportional to d.
b. proportional to d^2.
c. independent of what the length of the wire is.
d. independent of d.
Physics Heat & Thermodynamics Level: High School
A steel cable spanning a river is 200 m long when the temperature is 20 degree C . What will be its length when the temperature drops to 0 degree C ? (The coefficient of thermal expansion of steel is 12 x 10^-6 (K^-1) .
Physics Heat & Thermodynamics Level: High School
Properties of material
A copper wire is found to break when subjected to minimum tension of 36N . If the wire diameter were half as great , we would expect the wire to break when subjected to a minimum tension of ?
Physics Ray Optics Level: High School
Thin films
What is the minimum (non-zero) thickness for the air layer between two flat glass surface if the glass is to appear dark when 6.8E2-nm light is incident normally ?What if the glass is to appear bright ?
Physics Ray Optics Level: High School
Diffraction
How many lines per centimeter does a grating have if the third-order occurs at an 16.9o angle for 5.7E2-nm light ?
Physics Ray Optics Level: High School
Interference
In a double slit experiment , it is found that blue light of wavelength 3.6E2 nm gives a second-order maximum at a certain location on the screen . What wavelength of visible light would have a minimum at the same location ?
Physics Ray Optics Level: High School
How far apart are an object and an image formed by a 75-cm-focal-length converging lens if the images is 2.0 x larger than the object and is real ?
Physics Ray Optics Level: High School
How far from a converging lens with a focal length of 21 cm should an object be placed to produce a real image which is the same size as the object ?
Physics Ray Optics Level: High School
A stamp collector uses a converging lens with focal length 26cm to view a stamp 16cm in front of the lens .(a) Is the image real or virtual ?
(b) What is the magnification ?
Physics Ray Optics Level: High School
Total internal reflection
A beam of light is emitted in a pool of water from a depth of 77.0 cm . Where must it strike the air-water interface , relative to the spot directly above it . In order that the light does not exit the water ?
Physics Ray Optics Level: High School
A light beam composed of red and blue light is incident upon a rectangular glass plate , as shown in the figure at “click here” . The light emerges into the air from point P as two separate beams .That are parallel , with the blue beam displaced below the red beam .
That are parallel , with the red beam displaced below the blue beam .
That are not parallel , with the red beam displaced below the blue beam .
That are not parallel , with the blue beam displaced below the red beam .
None of the listed is correct .
