Oreva Quizzes Questions on Geometric and optical

A device that uses total internal reflection is

• Periscope

• Microscope

• Optical fiber

• Projector

A plane mirror forms am image that is

• real and inverted

• Virtual and upright

• Real and upright

• Virtual and inverted

Mirage formation is due to

• Total internal reflection

• Reflection

• Refraction through lens

• Diffraction

Dispersion of light produces

• Single color

• Black light

• Spectrum

• Shadows

The critical angle is

• The angle of incidence for which angle of refraction is 90°

• The minimum angle for reflection

• The angle of refraction at 90°

• None of the above

Light travel fastest in

• Water

• Diamond

• Glass

• Air

If the speed of light in glass is 2 × 10⁸ m/s , what is the refractive index of glass ( use c = 3 × 10⁸ m/s)

• 0.67

• 1.5

• 1.33

• 3.0

Which color of light bends the most in a prism?

• Red

• Green

• Blue

• Violet

When the angle of incidence is greater than the critical angle what happens

• The ray refract into the second medium

• They ray disappeared

• Total internal reflection occurs

• No reflection or refraction occurs

Which of the following combinations allows total internal reflection?

• Air to water

• Glass to water

• Water to Glass

• Water to air