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DERIVATION OF MIRROR FORMULA.
suggest me a working model project in physics
the images of clouds and trees in water always less bright than in reality-a.because water is forming the image dirty...b.because there is an optical illusion due to which the image apperars to be less bright
c.because only a portion f the incident light is reflected and quite a large portion goes mid water
d.because air abbove the surface of water contains a lot of moisture
what is the meaning of scattering of light?
when a clock is viewed in a mirror , the needles exhibit a time which appear sto be 8.20.then the actual time will be?
Derive an expression for the focal length of the combination of two thin lenses when they are SEPERATED by a small distance?
difference between extrinsic and intrinsic semiconductor
cbse XII physics investigatory project-
3.To find the refractive indices of (a)water (b) oil (transparent) using a plane mirror , a equiconvex lens and an adjustable object needle.
For the same value of angle of incidence the angle of refraction in three media A,Band C are 15 degree,25 degree and 35 degree respectively.in which medium the velocity of light be minimum?
how does focal length of a lens depends on the wavelength of light passed through?according to me the focal length should not change as focal length is a physical quantity of a lens so it should not change.
An equilateral prism of glass of refractive index of 1.45 is immersed in water of refractive index 1.33. A narrow beam of light falls normally on one face of the prism. find the angle of emergence of the beam??
derive F=R/2 for convex mirror
Why the uv graph of concave mirror is parobilic and1/u and1/v graph is a linear graph???
derive lens maker formula by concave lens
A convex lens of focal length 20cm is placed coaxially with a convex mirror of radius of curvature 20cm. The two are kept 15 cm apart. A point object is placed 40cm in front of the convex lens.Find the position of the image formed by the combination .
Diameter of a plano - convex lens is 6 cm and thickness at the centre is 3mm. If speed of light in material of
Which mirror is a convergent mirror? What type of image is formed by it? Can thevirtual image be screened or photographed?
prove that light waves are transverse in nature
Explain Mirage formation?
a double convex lens made of glass of refractive index 1.5 has its both surfaces of equal radii of curvature of 20 cm each an object of 5 height is placed at a distance of 10 cm from the lens .find the position ,nature and size of the image
how can we identify convex and concave lens without touching them?
The base of a tank is a horizontal plate of glass 8 cm thick(mu=1.6). above this is a layer of liquid of thickness 4.5 cm (mu=1.5) & upon this floats a layer water 12cm thick (mu=4/3). looking from above ,what is the apparent position of the spot on the bottom of the tank???
which of the following is the richest source of ammonia on a mass percentage basis:
practical reading of determination of refractive index of a glass slab using a travelling microscope
v versus u graph for convex and concave mirror
what is the formula for finding lateral displacement?
Derive a relation between the focal length and radius of curvature of a Plano convex lens made of
calculate speed of light in a medium whose critical angle is 30 degree.
Three rays of light red(R) ,green(G) and blue(B) are incident on the surface of a right angled prism normally on its perpendicular.The refractive indices for the material of tha prism for red,green and blue are 1.39,1.43,1.47 respectively.Trace the path of the rays through the prism.How will the situation change if the rays were falling normally on one of the faces of an equilateral prism?
a mirror is inclined at an angle thet awith the horizontal .if aray offl ight is inciden at an angle of incidence theta then the reflected ray makes the following angle with the horizontal
What is concave mirror used as shaving mirror?
derive the formula for magnification m=f/f-u fir spherical morror
A beam of
light converges at a point P. Now a lens is placed in the path of the
convergent beam 12 cm from P. At what point does the beam converge if
the lens is (a) a convex lens of focal length 20 cm, and (b) a
concave lens of focal length 16 cm?
(a) A giant
refracting telescope at an observatory has an objective lens of focal
length 15 m. If an eyepiece of focal length 1.0 cm is used, what is
the angular magnification of the telescope?
(b) If this
telescope is used to view the moon, what is the diameter of the image
of the moon formed by the objective lens? The diameter of the moon is
3.48 × 106
m, and the radius of lunar orbit is 3.8 × 108
draw a labelled ray diagram to show the formation of image in an astronomical telescope in the normal adjustment position and write the expression for its magnifying power.
a ray of light passes through an equilateral glass prism such that angle of incidence is equal to the angle of emergence.if the angle of emergence is 3/4 times angle of prism.calculate the refractive index of prism.
mirror equation to deduce that:
(a) an object
placed between f and
2f of a
concave mirror produces a real image beyond 2f.
(b) a convex
mirror always produces a virtual image independent of the location of
(c) the virtual
image produced by a convex mirror is always diminished in size and is
located between the focus and the pole.
(d) an object
placed between the pole and focus of a concave mirror produces a
virtual and enlarged image.
This exercise helps you deduce
algebraically properties of
images that one obtains from explicit ray diagrams.]
A ray of light PQ is incident at an angle of 60 degree on the face of AB of prism of angle 30 degree . The ray emerging out of the prism makes an angle of 30 degree with the incident ray. Show that the emergent ray is perpendicular to the face BC through which it emerges. Also calculate the refrractive index of the prism material.?plz reply soon.
A thin equiconvex glass lens of refractive index 1.5 has power of 5D.When the lens is immersed in a liquid of refractive index "s" it acts as divergent lens of focal length 10ocm. the value if "s" is??
What is the difference between crown glass and flint glass?
you are given following three lenses. which two lenses will you use as an eyepiece and as an objective to construct an astronomical telescope?L power aperture
L1 3D 8cm
L2 6D 1cmL3 10D 1cm
A lens behaves as a converging lens in air and a diverging lens in water (u = 4/3). What will be the condition on the value of refractive index (u) of the material of the lens ?
what is an optical centre of a lens?
draw a plot showing the variation of power of a lens with the wavelength of incident light.
how does the focal length of a convex lens change if monochromatic red light is used instead of monochromatic blue light?
a glass slab of thickness 4cm contains the same no of wavelength 5 cm of water when both are travnersed by same monochromatic light .calculate the r.i of glass
if a covex lens is cut horizontally from the middle what will happen to its focal length?also consider the case of a concave lens.
An object is placed at a distance of 15 cm from the convex lens of focal length 10 cm . on the other side of the lens , a convex mirror is placed such that its distance from the lens equals the focal length of the lens. The image formed by this combination is observed to coincide with the object itself. find the focal length of convex mirror..
An air bubble in a glass slab of refractive index 1.5 is 6cm eep as viewed from one face and 4cm deeo as viewed from the nother face. What is the thickness of the glass slab?
Derive the formula :f = D(square) - d (square) / 4d where D is the distance between the object and the screen and d is ditance between two locations of convex lens and f is the focal length.
draw a labelled ray diagram of compound microscope and explain its working.
how to draw Compound Microscope ray diagram step wise?how to draw Compound Microscope ray diagram step wise?
Does critical angle depend on color of light? Explain.
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