Lenses and Dispersion

The rays of light from a ray-box pass through three lenses placed at positions 1, 2 and 3.

Which type of lens is used at each position?

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When a converging lens is used as a magnifying glass, what is the nature of the image?

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A   real and inverted
B   real and upright
C   virtual and inverted
D   virtual and upright

An object O is placed between a converging lens and one principal focus F of the lens.

What is the magnification of the image formed?

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A   1.0
B   2.0
C   3.0
D   6.0

Which statement about red light and violet light is correct?

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A   A prism deviates red light more than it deviates violet light.
B   Red light has a lower frequency than violet light.
C   Red light has a shorter wavelength than violet light.
D   The speed of red light in a vacuum is less than the speed of violet light in a vacuum.

The following lists show colours of the spectrum.

Which list shows these colours in order of increasing frequency?

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A   $\text{blue} \rightarrow \text{violet} \rightarrow \text{red} \rightarrow \text{orange} \rightarrow \text{yellow} \rightarrow \text{green}$
B   $\text{green} \rightarrow \text{blue} \rightarrow \text{violet} \rightarrow \text{red} \rightarrow \text{orange} \rightarrow \text{yellow}$
C   $\text{red} \rightarrow \text{orange} \rightarrow \text{violet} \rightarrow \text{yellow} \rightarrow \text{green} \rightarrow \text{blue}$
D   $\text{red} \rightarrow \text{orange} \rightarrow \text{yellow} \rightarrow \text{green} \rightarrow \text{blue} \rightarrow \text{violet}$

An object O is placed near to a thin converging lens.

The diagram shows three rays of light from the object passing through the lens.

Which row describes the image formed and gives the position of a principal focus (focal point) of the lens?

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A student does an investigation using four thin lenses. The lenses are used to produce focused images of four different objects.

The student measures the length of the image and the length of the object. The results are shown in the table.

In which case is the magnification produced the greatest?

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Which diagram shows rays of light passing through a converging lens?

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A beam of white light is incident on a glass prism.

X and Y are the two ends of the visible spectrum.

Which statement is correct?

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A   All the light travels at the same speed in the prism.
B   The light at X has a lower frequency than the light at Y.
C   The light at X refracts more as it leaves the prism than the light at Y.
D   The white light refracts away from the normal as it enters the prism.

Which diagram shows how light from a distant object forms an image in a normal eye?

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