Optics Answers

A real image is formed with a converging lens. Which of the following actions will move the image point farther from the lens?
(a) decrease the object distance
(b) increase the radius of curvature
(c) decreases the index of refraction
(d) All are correct.

Which pair is exchanged in the reflection from a plane mirror? You may wish to draw a sketch in order to help you determine the proper answer.
(a) right and left
(b) up and down
(c) front and back
(d) None are correct.
(e) More than one of these.

Angle for 3rd maximum when wavelength 580nm and slit seperation 0.1mm

An object is placed 2 cm from a converging lens with a focal length of 5.4 cm. Which of the following correctly describes the image?




(a) real, inverted, reduced




(b) real, upright, enlarged




(c) virtual, inverted, enlarged




(d) virtual, upright, enlarged


(e) None are correct.

9. In a Newton’s ring arrangement, light consisting of wavelengths and incidents normally on a plane convex lens of radius of curvature R resting on a glass plate. If the nth dark ring due to coincides with (n+1)th dark ring due to , then show that the radius of the nth dark ring of is given by .

A glass lens of refractive index 1.5 is placed in a trough of liquid. What must be the refractive index of the liquid in order to mark the lens disappear?

A point traversed half the distance with a velocity v0. The remaining part of the distance was covered with velocity v1 for half the time, and with velocity v2 for the other half of the time. Find the mean velocity of the point averaged over the whole time of motion.

Explain reflection through an example.

What is interference?