The given graph shows the variation of photoelectric current (I) versus applied voltage (V) for two different photosensitive materials and for two different intensities of the incident radiations. Identify the pairs of curves that corresponds to different materials but same intensity of incident radiation.

Without access to the given graph, I am unable to directly identify the pairs of curves corresponding to different materials but the same intensity of incident radiation. However, I can provide a general explanation of how you can identify these pairs.

When comparing the photoelectric current versus applied voltage graphs for different photosensitive materials but the same intensity of incident radiation, you need to look for similarities and differences in the characteristics of the curves.

Here's how you can identify the pairs of curves corresponding to different materials but the same intensity of incident radiation:

1. Similar Characteristics: Look for curves that have similar shapes and trends. Even though the absolute values of the currents may be different, the overall behavior of the curves should be comparable. For example, both curves may exhibit a linear region followed by saturation at higher voltages.

2. Shifts in Threshold Voltage: Compare the threshold voltages (voltages at which the photoelectric current starts to increase significantly) for each material. If the intensities of the incident radiation are the same, the threshold voltages should be similar for the corresponding pairs of curves. Look for shifts in the threshold voltage between pairs of curves, as these may indicate differences in the work functions of the materials.

3. Intersections and Crossings: Examine whether the curves intersect or cross each other at any point. If two curves intersect, it suggests that the corresponding materials have different properties. However, if two curves do not intersect but exhibit similar behavior, they likely correspond to different materials but the same intensity of incident radiation.

By carefully analyzing these characteristics, you should be able to identify the pairs of curves that correspond to different materials but the same intensity of incident radiation on the graph.