2023.01.13_Revision Chapter 8

Which of the following is the application of concave mirror in daily life?

• Periscope

• Kaleidoscope

• Dental mirror

• Car side mirrors

The captain of a submarine wants to see whether there is any ship on the sea. What is the instrument that can be used by the captain?

• Telescope

• Periscope

• Binoculars

• Magnifying glass

Which of the following statements is true about the properties of light?

• Light cannot be dispersed

• Light cannot be reflected

• Light cannot pass through an opaque object

• Light travels slower than sound

The following information shows the characteristics of image formed by an object.

- upright

- laterally inverted

- same size as object

- same distance as object distance

• Plane mirror

• Cylinder lens

• Concave mirror

• Convex mirror

Which of the following is true about the law of light reflection?

• The angle of incidence is the same as the angle of reflection

• The angle of incidence is different than the angle of reflection

• The angle of incidence is the angle at which light ray is reflected

• The incident ray, the reflected ray and the normal line lie on different planes

What causes the dispersion of light to occur?

• Light travels in straight lines

• Light can be reflected

• Water droplets are suspended in the air after the rain stopped

• Different colours of light travel at different speeds

Which phenomenon shows the effect of light dispersion?

• The blue sky

• Formation of rainbow

• The red sunset

• Bending of a pencil in a beaker filled with water

Which of the following is secondary colour?

• Cyan

• Blue

• Green

• Red

Which of the following statements is true?

• Black is a primary colour

• White is a secondary colour

• The addition of primary colours can form secondary colours

• Primary colours are the basic colours produced by mixing other colours