Refraction and Light Behavior Quiz

Which of the following is the correct definition of refraction?

• Bending of light when it passes from one medium to another

• Bending of light around obstacles

• Reflection of light from a surface

• Dispersion of light

When light travels from air to water, it bends towards the normal. This is because:

• The speed of light increases in water

• The speed of light decreases in water

• The refractive index of water is less than that of air

• The wavelength of light increases

If a ray of light strikes a plane mirror at an angle of 30°, what will be the angle of reflection?

• 15°

• 30°

• 60°

• 90°

A person standing in front of a plane mirror will observe his image to be:

• Real and inverted

• Real and erect

• Virtual and erect

• Virtual and inverted

Critical angle for light passing from water (refractive index = 1.33) to air is 48.6°. What is the refractive index of water?

• 1.33

• 1.24

• 1.50

• 1.00

The image formed by a concave mirror when the object is placed at the focus is:

• Real, inverted, and magnified

• Virtual, erect, and magnified

• Real, erect, and diminished

• Virtual, inverted, and diminished

Which of the following diagrams correctly shows the refraction of light from air to water?

• Light bends towards the normal

• Light bends away from the normal

A student uses a concave mirror to form an image of a distant object. The image formed will be:

• Real, inverted, and diminished

• Real, inverted, and magnified

• Virtual, erect, and diminished

• Virtual, erect, and magnified

What happens to the speed of light when it enters a denser medium?

• It increases

• It decreases

• It remains the same

• It depends on the color of light

A person is standing in a swimming pool. If he looks at the bottom of the pool, the apparent depth is less than the real depth. This is due to:

• Reflection of light

• Dispersion of light

• Refraction of light

• Total internal reflection