Optics Answers

Morty is depressed. One night while sitting on the pier, aimlessly shining his laser into the water, he sees a glint from a shiny object. Specifically, he sees this light when he shines the laser 2.4 m in front of him while holding the pointer 1.8 m above the water. If the water is 5.5 m deep, what is the horizontal distance to the shiny object on the ocean floor? (Note: the index of refraction for water is 1.33)

in a biprism expt., the distance of 20th bright band from centre of interference pattern is 8mm.calculate distance of 30th bright band from centre.

A cylindrical vessel, whose diameter and height both are equal to 30 cm, is placed on a horizontal surface and a small
particle P is placed in it at a distance of 5.0 cm from the centre. An eye is placed at a position such that the edge of the
bottom is just visible. The particle P is in the plane of drawing. Up to what minimum height should water be
poured in the vessel to make the particle P visible?

How far from a converging lens of focal length 30 cm must an object be placed so the image will be virtual and 3.0 times as large as the object?

give the limitations of video recording on magnetic media

On your way back from Planet X, you pass a space cowboy riding an asteroid going in the
opposite direction. You’re heading back to Earth at 150 km/s, and the space cowboy is going
250 km/s.
a) From your point of view, how fast does the space cowboy appear to be going, in m/s? (2)
b) If you beam a 650 nm red laser at the space cowboy before you pass each other, what
wavelength will he receive? (3)
c) If you beam the same laser at him after you pass each other, what wavelength will he
receive? (3)

A w0cm high object is placed on the principal axis at a distance 12 cm from the pole . If the image is inverted real and 5 cm high find the focal length of the mirror and the location of the image?

a concave mirror forms the real image of an object which is magnified four times .the object is moved 3cm away .the magnification of the image is 3 times what is focal length?

a 20 cm object is placed on the principal axis of a concave mirror at a distance 12 cm from the pole .if the image is inverted real and 5 cm high find the location of image and the focal length of the mirror?