Using figure 22.1, find the relative luminosity of wavelength (a) 480 nm, (b) 520 nm (c ) 580 nm and (d) 600 nm.

Explanation

To find the relative luminosity for the given wavelengths using the figure (22.1), we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Wavelengths**: We need to find the relative luminosity for the following wavelengths:
- (a) 480 nm
- (b) 520 nm
- (c) 580 nm
- (d) 600 nm

2. **Locate 480 nm on the Graph**:
- Look at the graph for the wavelength of 480 nm.
- The relative luminosity at this point is approximately **0.2**.

3. **Locate 520 nm on the Graph**:
- Now, find the wavelength of 520 nm on the graph.
- The relative luminosity at this point is approximately **0.8**.

4. **Locate 580 nm on the Graph**:
- Next, find the wavelength of 580 nm on the graph.
- The relative luminosity at this point is also approximately **0.8**.

5. **Locate 600 nm on the Graph**:
- Finally, find the wavelength of 600 nm on the graph.
- The relative luminosity at this point is approximately **0.5**.

### Summary of Results:
- For 480 nm, the relative luminosity is **0.2**.
- For 520 nm, the relative luminosity is **0.8**.
- For 580 nm, the relative luminosity is **0.8**.
- For 600 nm, the relative luminosity is **0.5**.