Exam 34: Images

A convex refracting surface has a radius of 12 cm.Light is incident in air (n = 1)and refracted into a medium with an index of refraction of 2.To obtain light with rays parallel to the central axis after refraction a point source should be placed on the axis:

Which of the following five glass lenses is a diverging lens?

When you stand in front of a plane mirror, your image is:

An erect object is 2f in front of a convex lens of focal length f.The image is:

The Sun subtends 0.5° as seen from the Earth.Its image, using a 1.0-m focal length lens, is about:

A virtual image is one:

An erect object is placed on the central axis of a thin lens, further from the lens than the magnitude of its focal length.The magnification is +0.4.This means:

A converging lens is symmetric; its curved sides have radii of 50 cm.If the focal length is to be 80 cm, what should the index of refraction be?

A concave spherical mirror has a focal length of 12 cm.If an object is placed 6 cm in front of it the image position is:

A card marked IAHIO8 is standing upright in front of a plane mirror.Which of the following is NOT true?

In a two lens microscope, the intermediate image is:

Let p denote the object-lens distance and i the image-lens distance.The image produced by a lens of focal length f has a height that can be obtained from the object height by multiplying it by:

A concave refracting surface of a medium with index of refraction n produces a real image no matter where an object is placed outside:

A plano-convex glass (n = 1.5)lens has a curved side whose radius is 50 cm.If the image size is to be the same as the object size, the object should be placed at a distance from the lens of:

A concave spherical mirror has a focal length of 12 cm.If an object is placed 18 cm in front of it the image position is:

A camera with a lens of focal length 6.0 cm takes a picture of a 1.4-m man standing 11 m away.The height of the image is about:

An object faces a spherical refracting surface.If r is negative,

An erect object placed outside the focal point of a converging lens will produce an image that is:

Which of the following is NOT correct for a simple magnifying glass?