Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 23

EASY

MHT-CET

IMPORTANT

Earn 100

Glancing angle $θ$ is equal to (where, $i$ is angle of incidence and $r$ is angle of refraction)

33.33% studentsanswered this correctly

Important Questions on Ray Optics

EASY

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 24

The ray of light travelling from an optically denser medium to optically rarer medium bends

EASY

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 25

When a ray of monochromatic light enters from rarer medium to denser medium obliquely, the angle of incidence

i

and angle of refraction

r

is related as

EASY

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 26

If the ray of light travels from medium

1

to medium

2

and ultimately reverses its path then the phenomenon is ______.

EASY

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 27

A monochromatic ray is incident on a glass slab with glancing angle

30 °

with the surface. If the refractive index of glass with respect to air is

\sqrt{3},

the angle of refraction in the glass slab is

MEDIUM

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 28

The refractive index of water relative to air is

\frac{5}{3}

. A ray of light passing from water into air is incident at the interface at an angle of

32 °

with the normal. What angle does the refracted ray make with the normal? (

\sin (32 °) = 0.53

,

\sin (62.03 °) = 0.883

)

EASY

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 29

A ray of light travelling in water is incident on its open surface in air. The angle of incidence is

θ °

, which is less than the critical angle. Then there will be

EASY

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 30

Assertion: The frequencies of incident, reflected and refracted beam of monochromatic light incident from one medium to another are same.

Reason: The incident, reflected and refracted rays are coplanar.

EASY

MHT-CET

IMPORTANT

Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 31

To an observer on the earth, the stars appear to twinkle. This can be ascribed to,