Topic 4 Quiz

When a light ray hits a mirror at an angle, the angle is measured from:
1. the surface of the mirror
2. the normal line
3. the reflected ray
4. the source of the light
How are the angles of incidence and reflection related?
1. The angle of reflection is greater than the angle of incidence
2. The angle of reflection is less than the angle of incidence
3. The two angles are always equal.
4. The angle of reflection is 90 degrees of the angle of incidence is 0 degrees.
Which one of these statements correctly describes the image in a plane mirror?
1. It is laterally inverted, upside down, and the same distance from the mirror line as the object
2. It is laterally inverted, right way up, and at a greater distance from the mirror line than the object
3. It is laterally inverted, upside down, and a greater distance from the mirror line than the object
4. It is laterally inverted, right way up, and the same distance from the mirror line as the object
Images can be described as real or virtual. Which one statement gives the correct meaning for these terms?
1. A real image can be projected onto a screen while a virtual image cannot.
2. Both can be projected onto a screen
3. Neither can be projected onto a screen.
4. A virtual image exists only in a computer, while a real image can be seen with the naked eye.
Which one of these statements is true about a concave mirror?
1. It makes light rays diverge
2. It focuses rays onto a principal focus.
3. It can be used as a security mirror.
4. It does not obey the law of reflection
Which one of these statements is true about refraction?
1. It is only seen with light waves, because the light waves travel faster in glass than air.
2. Refraction only occurs with water waves and light waves.
3. Refraction can be seen with any kind of wave where the wave changes speed after passing a boundary.
4. Angle of incidence = angle of refraction
A ray of monochromatic light passes from glass to air at an angle of incidence. Which one of these is the correct statement?
1. The ray bends towards the normal.
2. The ray bends away from the normal
3. The ray is absorbed.
4. The ray splits into a spectrum
When white light passes through a prism, a spectrum is seen. This is because:
1. White light is a mixture of colours.
2. White light is a single colour.
3. White light does not obey the laws of refraction.
4. White light does not travel in straight lines.
A lens has a magnification of 15. This means that the image of an object 3 cm tall has a size of:
1. 0.2 cm
2. 3 cm
3. 15 cm
4. 45 cm
Which one of these best describes the sharp image on a film of an object that is 5 times the focal length of a camera lens?
1. It is out of focus.
2. It is inverted, diminished, and virtual.
3. It is inverted, diminished, and real.
4. It is inverted, magnified, and virtual.