1st Year Physics Chapter 8 TestPhysical Optics and Gravitational Waves

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Malu's law deal with:

   1. Intensity of reflected light

   2. Intensity of polarized light passing through an analyzer

   3. Frequency of light

   4. Wavelength of polarized light

2. Which of the following devices can be used to polarize light?

   1. Prism

   2. Convex lens

   3. Polaroid sheet

   4. Plane mirror

3. Which is the primary method used to detect gravitational waves?

   1. Optical telescopes

   2. Radio telescopes

   3. LASER interferometry

   4. Gravitational lensing

4. According to Brewster's law. the reflected and refracted rays are:

   1. Parallel

   2. Perpendicular

   3. At 45^o

   4. Colinear

5. The condition for maximum intensity of light in a polarization experiment is when:

   1. The light wave and analyzer are perpendicular

   2. The light wave and analyzer are parallel

   3. The light wave and analyzer are at an angle of 45^o

   4. The light wave and analyzer are at an angle of 60^o

6. What is the nature of gravitational waves?

   1. Longitudinal waves in space-time

   2. Transverse waves in space-time

   3. Sound wave in space

   4. Circular waves in space

7. Unpolarized light can be converted into polarized light by:

   1. Reflection

   2. Refraction

   3. Scattering

   4. All of these

8. Gravitational waves travel at the speed of:

   1. Sound

   2. Light

   3. Gravity (unknown)

   4. Electricity

9. The intensity of light when it passes through a polarizer:

   1. Increases

   2. Decreases

   3. Remains the same

   4. Becomes zero

10. What are gravitational waves?

    1. Electromagnetic waves

    2. Mechanical Waves

    3. Ocean waves

    4. Ripples in the fabric of spacetime