Ray Optics And Optical Instruments Mock Tests

A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 30 cm. The combination acts as:

A glass prism of refractive index √2 has a refracting angle of 60°. The angle of minimum deviation is:

Light passes from a medium with refractive index 1.5 into a medium with refractive index 1.3. The critical angle for total internal reflection is:

A glass prism of refractive index √2 has an angle of 60°. The angle of minimum deviation is:

Light passes from a medium with refractive index 1.5 into a medium with refractive index 1.3. The critical angle for total internal reflection is:

Light travels from a denser medium of refractive index 1.62 to a rarer medium of refractive index 1.5. The critical angle is:

A concave mirror of focal length 15 cm forms an image of the same size as the object. The distance of the object from the mirror is:

A convex lens of focal length 20 cm is dipped in water. Its focal length will: