Optics (Test 2)

A spherical surface separates air and glass (μ = 1.5). Object is at O, center is C, radius is R. The image distance is:

A convex lens (μ = 1.5) has focal length 24 cm in air. When immersed in water (μ = 1.33), its focal length becomes:

Two concave refracting surfaces of equal radii and μ = 1.5 face each other. A point object is placed midway. The separation between images formed is:

A convex lens is silvered on one side. An object is placed such that image forms at same location. The object distance is:

A concave mirror produces an image such that object-image distance is 20 cm and magnification is –3. Radius of curvature is:

A prism of angle 4° and μ = 1.54 is combined with another prism of μ = 1.72 to get dispersion without deviation. Angle of second prism is:

A hemispherical vessel is filled with liquid of refractive index μ. A coin at bottom is visible from edge. Minimum μ is:

A plano-convex lens (μ = 1.5) immersed in liquid (μ = 1.2) behaves like concave mirror of focal length 0.2 m. Radius of curvature is:

A convex lens of focal length 40 cm forms image on photoelectric cell. Current I is produced. Replacing lens with same diameter but focal length 20 cm, current becomes:

A microscope focused on object at bottom of bucket. Liquid (μ = 5/3) poured, microscope raised by 30 cm to refocus. Height of liquid is: