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Optics
how linearly polarized light converted into linear polarized light with differen azimuth angle
Optics
what happens to the compressions or rarefactions when they hit the wall on a fixed end?
Optics
1 A convex mirror has a radius of 20 cm. An object is placed 30 cm in front of the mirror. Determine where the image will appear.
−45cm
−55cm
−6.5cm
−7.5cm
−45cm
−55cm
−6.5cm
−7.5cm
Optics
A ray incident on a glass prism undergoes minimum deviation when:
incident angle is equal to the angle of refraction
refraction angle equals 90o
incident angle equals 90o
incident angle is equal to the angle of emergency
incident angle is equal to the angle of refraction
refraction angle equals 90o
incident angle equals 90o
incident angle is equal to the angle of emergency
Optics
The Bragg angle for reflection from the (110) planes in bcc iron is 22º for an x-ray of
wavelength 1.54 Å. Find the cube edge for iron (take n = 1). What is the minimum
wavelength with which the structure of this unit cell can be probed ?
wavelength 1.54 Å. Find the cube edge for iron (take n = 1). What is the minimum
wavelength with which the structure of this unit cell can be probed ?
Optics
In an experiment involving the convex lens, which of the following is NOT correct?
images must always be sharply focused
the tip of object pin must be at the same height as the center of lens
images obtained must always be magnified
parallax error must be avoided
images must always be sharply focused
the tip of object pin must be at the same height as the center of lens
images obtained must always be magnified
parallax error must be avoided
Optics
Calculate the distance and magnification of an object placed 20cm from a converging lens
60cm and 0.3 times the size of object
20cm and 0.3 times the size of object
60cm and 3 times the size of object
80cm and 3 times the size of object
60cm and 0.3 times the size of object
20cm and 0.3 times the size of object
60cm and 3 times the size of object
80cm and 3 times the size of object
Optics
Which of the following is NOT true of experiments involving curved mirrors?
image distance is negative for for real image
object distance is positive
image distance is negative for virtual image
focal length is negative for convex mirrors
image distance is negative for for real image
object distance is positive
image distance is negative for virtual image
focal length is negative for convex mirrors
Optics
The image of an object is found to be upright and reduced in size. What type of mirror is used to produce such an image?
Concave
Convex
Both mirrors
None of the above
Concave
Convex
Both mirrors
None of the above
Optics
Why the rays must fall on the grating surface normally in measurement of laser wavelength?
