Optics Answers

A convex lens forms a real image of a point object at a distance of 50 cm from the convex lens. A concave lens is placed 10 cm behind the convex lens on image side. On placing a plane mirror on the image side and facing the concave lens, it is observed that the final image now coincides with the object itself. The focal length of the concave lens is?
a) 50 cm b)20cm c) 40 cm d) 25 cm

A plane mirror is made of glass slab (refractive indec of glas =1.5) 2.5 cm thick and silvered on back.A point source is placed 5cm front of the unsilvered face of the mirror.What will be the position of final image?

A single slit has a width of 0.04 mm. A parallel beam of light of wavelength 560 nm
is incident normally on it. If the distance between the slit and the screen is 100 cm,
calculate the separation between the central maximum and the second minima in the
diffraction pattern

A trough 12.0cm deep is filled with water of refractive index 4/3 how much would a coin at the bottom of trough appear to be displaced when viewed vertically from above the water surface

In a single slit interference is observed? Justify your answer with proper coments

In a single slit interference is observed? Justify your answer with proper coments

What is the relation between focal length and radius of a lens?

The distance between an object and a screen is 98cm. A convex lens placed between object and screen so as it get an image on the screen magnified 12 times. Calculate the focal length and power of lens.

Could the alternating current resistance of a device depends on the frequecy?

In what way are the laser light and star light similar in ways they are different?