Ray Optics Test

Result

Ray Optics Test - 83

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The deviation caused in red, yellow and violet colours for crown glass prism are 2.84°, 3.28° and 3.72° respectively. The dispersive power of prism material is

A
0.268

B
0.368

C
0.468

D
0.568

Solution
Question 2
4 / -1

Dispersion of light is due to

A
Wavelength

B
Intensity of light

C
Density of medium

D
None of these
Question 3
4 / -1

Pick the correct statement from the following.

A
Primary rainbow is a virtual image and secondary rainbow is a real image

B
Primary rainbow is a real image and secondary rainbow is a virtual image.

C
Both primary and secondary rainbows are virtual images.

D
Both primary and secondary rainbows are real images.
Question 4
4 / -1

When white light enters a prism, it gets split into itsconstituent colours. This is due to

A
High density of prism material

B
Because i.t is different for different A.

C
Diffraction of light

D
Velocity changes for different frequencies
Question 5
4 / -1

The dispersive powers of crown and flint glasses are 0.02 and 0.04 respectively. In an achromatic combination of lenses the focal length of flint glass lens is 40 cm. The focal length of crown glass lens will be

A
– 20 cm

B
+ 20 cm

C
– 10 cm

D
+ 10 cm

Solution
Question 6
4 / -1

Consider the following two statements A and B and identify the correct choice in the given answers
A : Line spectra is due to atoms in gaseous state
B : Band spectra is due to molecules

A
Both A and B are false

B
A is true and B is false

C
A is false and B is true

D
Both A and B are true
Question 7
4 / -1

Under minimum deviation condition in a prism, if a ray is incident at an angle 30°, the angle between the emergent ray and the second refracting surface of theprism is

A
0°

B
30°

C
45°

D
60°

Solution
Question 8
4 / -1

A ray of light is incident normally on one of the face of a prism of angle 30° and refractive index√2. The angle ofdeviation will be

A
26°

B
0°

C
23°

D
15°

Solution
Question 9
4 / -1

The spectrum obtained from an electric lamp or redhot heater is

A
Line spectrum

B
Band spectrum

C
Absorption spectrum

D
Continuous spectrum
Question 10
4 / -1

Which one of the following alternative is FALSE for a prism placed in a position of minimum deviation

A
i₁. = i₂

B
r₁ = r₂

C
i₁. = r₁

D
All of these

Solution