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Optics
What is true about the refractive index of a medium?
Optics
1. Calculate the least width that a grating must have to resolve the components of D lines (5890 and5896 A0 ) I n the second order. The grating has 800 lines per cm
Optics
When a lens is placed 10cm away from a screen and distance "u" from a object to get it's sharp image screen be placed 8cm away from it's initial position then find out focal length of lens and it's nature ?
Optics
A thin concave and convex lenses are in contact. The ratio of the magnitude of power of two lenses is 2/3 and focal lengths of individual lenses are _____ ?
Optics
An obj{r 2.4 m in tront of a letu form a
shrp image 6n a filrn 12 cn behid th€
l€s. A glass plat€ 1m thick of €fnctive
indd 1.50 is inle.po*d kws les and
iilm witi itl llane faces Paiallel lo firn
At whar distafte (from lere) shodd obj&t
b€ snifkd to be in sharP l@s d 61
shrp image 6n a filrn 12 cn behid th€
l€s. A glass plat€ 1m thick of €fnctive
indd 1.50 is inle.po*d kws les and
iilm witi itl llane faces Paiallel lo firn
At whar distafte (from lere) shodd obj&t
b€ snifkd to be in sharP l@s d 61
Optics
when a lens is placed 10cm away from a screen.To get it's sharp image screen be placed 8cm away from it;s initial position then find out focal length of lens ?
Optics
a jeweler examines a diamond with a magnifying glass. If the near point distance of the jeweler is 20.8cm and the focal length of the magnifying glass is 7.50cm. Find the angular magnification when the diamond is held at the focal point of the magnifier assuming the magnifying glass is directly infront of the jeweler's eye
Optics
Can you create a visual effect in which viewing an opening 2" tall in the center of a 6" tall wall will allow you to view through an opening 2" tall in the center of a wall placed at a 90 degree turn 10" away? This could use convex or concave lenses, with prisms or mirrors, of commercial availability. Thanks.
Optics
diameter of a plano convex lens is 6cm and thickness at the centre is 3mm.if speed of light in material of lens os 2*100000000m/s,the focal length of the lens is?
Optics
If a mirror gets half covered with a black paper then will it show the full image of the object both in spherical mirrors and plane mirror as well as lens? explain with the help of diagram
