Download App

Ray Optics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsRay Optics1 Mark
MCQ
A medium is said to be dispersive, if
  • ✓
     Light of different wavelengths propagate at different speeds
  • B
     Light of different wavelengths propagate at same speed but has different frequencies
  • C
     Light is gradually bent rather than sharply refracted at an interface between the medium and air
  • D
    Light is never totally internally reflected
✓

Answer

Correct option: A.
 Light of different wavelengths propagate at different speeds
Light of different wavelengths propagate at different speeds

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Ray Optics→Ray Optics — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Out of the following, choose the ray which does not travel with the velocity of light
→
When a plane polarised light is passed through an analyser and analyser is rotated through $90^o ,$  the intensity of the emerging light
→
A proton (mass m and charge +e) and an α - particle (mass 4m and charge +2e) are projected with the same kinetic energy at right angles to the uniform magnetic field. Which one of the following statements will be true
→
In positive logic, the logic state $1$ corresponds to:
→
$C$ and $Si$ both have same lattice structure ; having $4$ bonding electrons in each. Howeve, $C$ is insulator where as $Si$ is intrinsic semiconductor. This is because
→
Which of the following have highest specific charge
→
A student wants to find if a star if moving away from the earth or towards the earth. Which of the following principle he can use?
→
A transparent solid cylindrical rod has a refractive index of $\frac{4}{\sqrt {3}}$ It is surrounded by a medium of refractive index $2$. A light ray is incident at the mid-point of one end of the rod as shown in the figure.

The incident angle $\theta $ for which the light ray grazes along the wall of the rod is

→
In a PN-junction diode not connected to any circuit
→
A potential divider is used to give outputs of $4\,V$ and $8\,V$ from a $12\,V$ source. Which combination of resistances, $(R_1 : R_2 : R_3)$ gives the correct voltages
→