Optics Answers

A ladder 7.00 m long leans against a wall inside a spaceship. From the point of view of a person on the ship, the base of the ladder is 2.50 m from the wall. The spaceship moves past the Earth with a speed of 0.94c in a direction parallel to the floor of the ship. What is the length of the ladder as seen by an observer on Earth?

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1.   Is it possible to photograph the image of a person in a mirror? If the person being photographed is 6 feet from the mirror and the camera is 10 feet from the mirror, from what distance should be the focus of the camera to produce a sharp image?

Newton's rings are formed in reflected light of wavelength 6000Å with aliquid between the plane and curved surfaces. If the diameter of the 6th bright ring be 3.1 mm and the radius of curvature of the curved surface be 1 m, the refractive index of the liquid will be

  A magnified, inverted image is located a distance of 38.0 cm from a converging lens with a focal length of 10.0 cm. Determine the object distance and tell whether the image is real or virtual.

The minimum deviation for a glass prism is 45.7° and the refractive index of glass is 1.529. Find the angle of the prism.

Interference fringes are produced with monochromatic light falling normally on a wedge shaped film of refractive index 1.4. The angle of the wedge is 10 seconds of an arc and distance between the successive fringes is 0.5 cm. Calculate the wavelength of light used.