Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the shirts in the image?
Pinhole camera does not change the colour of the image. Hence the colours of the shirts in the image will remain same as the colour of the shirt.
But the image of the person will be inverted when seeing through a pinhole camera as Image obtained using a pinhole camera is inverted.