PHYSICS [1 Mark Question Answer]

The object appears black because no light is reflected from it.

Yellow colour will appear on the screen.

The colours red, green and blue (RGB) are called primary colours. These colours are called primary colours, because they cannot be made by mixing other colours.

Light rays always travel in a straight line. Unlike sound, light j does not need a material medium to travel. Light can travel 5 through vacuum. The speed of light is around 3,00,000 km/s i in vacuum.

The angle of reflection will be 30°.

When a coloured light falls on a different coloured object, the object appears black because no light is reflected from it. So, a red rose when seen in green light appears black.

It is due to the lateral inversion, a behaviour shown by mirrors according to which the object and the image interchange their left and right.

Plane mirrors are used in kaleidoscope which is used to produce changing patterns or sequences by means of multiple reflections by many mirrors.

The image formed by plane mirrors is virtual and virtual image is always erect.

Rough surfaces give diffused reflection because the parallel beam of light that strikes the rough surface gets scattered and are reflected in different directions.