Class VIII-Light

Which one of the following statements is correct regarding rods and cones in the human eye?

• Cones are sensitive to dim light

• Cones are sensitive to bright light

• Rods are sensitive to bright light

• Rods can sense colour

What is the angle of incidence of a ray, if the reflected ray is at an angle of 120° to the incident ray?

• 45

• 100

• 120

• 60

The amount of light entering the eye is controlled by:

• eye lens

• cornea

• iris

• ciliary muscle

Which of the following works on the concept of multiple reflections?

• Telescope

• Binoculars

• Kaleidoscope

• Sunglasses

Which part of eyes is controlled by iris?

State the second law of reflection.

1. Label the parts of human eye from A to G

Two plane mirrors are inclined at an angle of 40°. The number of images formed will be:

Which property of the eye is used in movies?

The least distance of distinct vision for a young adult with normal vision is about

• 25m

• 25cm

• 2.5m

• 0.25cm