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Optics
A STAR EMITTING RADIATION AT A WAVELENGTH OF 5000Å IS APPROACHING EARTH AT A VELOCITY OF 1.5x10^6 m/s. THE CHANGE IN WAVELENGTH ON EARTH IS :
1. 2.5Å
2. 1000 Å
3. ZERO
4. 25 Å
1. 2.5Å
2. 1000 Å
3. ZERO
4. 25 Å
Optics
.A man wants to get a picture of a zebra. He photographed a white donkey after fitting a glass,
with black stripes, on to the lens of his camera. What photo will he get?
with black stripes, on to the lens of his camera. What photo will he get?
Optics
Suppose you are inside the water in a swimming pool near an edge. A friend is standing on the
edge. Do you find your friend taller or shorter than his usual height?
edge. Do you find your friend taller or shorter than his usual height?
Optics
The maximum number of possible interference maxima when slit separation is equal to 4 times the wavelength of light used in a double slit experiment is – A)∞ B) 9 C)8 D) 4
Optics
I have been prescribed prism lenses to correct double vision following vitrectomony surgery - ½ prism in each eye lens (so that they would not be as thick). I was tested & the vision corrected by my looking through only a full prism on 1 eye. Will splitting the prism have the same effect? Thanks
Optics
THE DIAMETER OF THE MOON IS 3.5x103 km AND ITS DISTANCE FROM EARTH IS 3.8x105 km. IT IS SEEN BY A TELESCOPE HAVING FOCAL LENGTHS OF OBJECTIVE AND EYE PIECE AS 4m AND 10cm RSPLY.THE DIAMETER OF THE IMAGE OF THE MOON IS NEARLY : (in degrees)
1. 2
2. 20
3. 40
4. 50
1. 2
2. 20
3. 40
4. 50
Optics
THE MAGNIFYING POWER OF GALILEAN TELESCOPE IN THE NORMAL ADJUSTMENT IS 20.THE DIFFERENCE BETWEEN THE MAGNIFYING POWER AND LENGTH OF THE TELESCOPE IS 19.05.THE FOCAL LENGTH OF OBJECTIVE AND EYE PIECE ARE : (inmeters)
1. 1 and -0.05
2. 0.05 and 2
3. 1 and 0.05
4. 2 and 0.05
1. 1 and -0.05
2. 0.05 and 2
3. 1 and 0.05
4. 2 and 0.05
Optics
THE IMAGE OF A SMALL ELECTRICAL BULB FIXED ON THE WALL OF A ROOM IS TO BE OBTAINED ON THE OPPOSITE WALL 4m AWAY BY MEANS OF A LARGE CONVEX LENS.THE MAX. PSSIBLE FOCAL LENGTH OF THE LENS REQUIRED FOR THIS PURPOSE WILL BE :
1. 0.5m
2. 1m
3. 1.5m
4. 2m
1. 0.5m
2. 1m
3. 1.5m
4. 2m
Optics
A glass slab is placed over a page of letters in which the letters are printed with different colors. Which letter would appear to be maximum raised and which one minimum raised?
Optics
An equiconvex lens of radius of curvature is cut in two equal parts by vertical plane so it becomes plano convex. if "f" is the focal length of equi convex lens then what will be the focal length of plano convex lens?
