a student measures the focal length of a convex lens by

A student measures the focal length of a convex lens by putting an object pin at a distance $$'u’$$ from the lens and measuring the distance $$'v’$$ of the image pin. The graph between $$'u’$$ and $$'v’$$ plotted by the student should look like

Answer : Ray Optics mcq option image

Solution :
This graph obeys the lens equation
$$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$$
where $$f$$ is a positive constant for a given convex lens

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Optics and Wave >> Ray Optics

Releted Question 1

When a ray of light enters a glass slab from air,

A. Its wavelength decreases.

B. Its wavelength increases.

C. Its frequency decreases.

D. neither its wavelength nor its frequency changes.

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Releted Question 2

A glass prism of refractive index 1.5 is immersed in water (refractive index $$\frac{4}{3}$$ ). A light beam incident normally on the face $$AB$$ is totally reflected to reach on the face $$BC$$ if

A. $$\sin \theta \geqslant \frac{8}{9}$$

B. $$\frac{2}{3} < \sin \theta < \frac{8}{9}$$

C. $$\sin \theta \leqslant \frac{2}{3}$$

D. None of these

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Releted Question 3

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A. $${\sin ^{ - 1}}\left( {\tan r} \right)$$

B. $${\sin ^{ - 1}}\left( {\tan i} \right)$$

C. $${\sin ^{ - 1}}\left( {\tan r'} \right)$$

D. $${\tan ^{ - 1}}\left( {\sin i} \right)$$

View Answer

Releted Question 4

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A. $${\sin ^{ - 1}}\left( {\tan r} \right)$$

B. $${\sin ^{ - 1}}\left( {\tan i} \right)$$

C. $${\sin ^{ - 1}}\left( {\tan r'} \right)$$

D. $${\tan ^{ - 1}}\left( {\sin i} \right)$$

View Answer

A student measures the focal length of a convex lens by putting an object pin at a distance $$'u’$$ from the lens and measuring the distance $$'v’$$ of the image pin. The graph between $$'u’$$ and $$'v’$$ plotted by the student should look like

Releted MCQ Question on
Optics and Wave >> Ray Optics

When a ray of light enters a glass slab from air,

A glass prism of refractive index 1.5 is immersed in water (refractive index $$\frac{4}{3}$$ ). A light beam incident normally on the face $$AB$$ is totally reflected to reach on the face $$BC$$ if

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

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Ray Optics

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A student measures the focal length of a convex lens by putting an object pin at a distance $$'u’$$ from the lens and measuring the distance $$'v’$$ of the image pin. The graph between $$'u’$$ and $$'v’$$ plotted by the student should look like

Releted MCQ Question on Optics and Wave >> Ray Optics

When a ray of light enters a glass slab from air,

A glass prism of refractive index 1.5 is immersed in water (refractive index $$\frac{4}{3}$$ ). A light beam incident normally on the face $$AB$$ is totally reflected to reach on the face $$BC$$ if

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

A ray of light from a denser medium strike a rarer medium at an angle of incidence $$i$$ (see Fig). The reflected and retracted rays make an angle of $${{{90}^ \circ }}$$ with each other. The angles of reflection and refraction are $$r$$ and $$r’$$ The critical angle is

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Practice More MCQ Question on Physics Section

Releted MCQ Question on
Optics and Wave >> Ray Optics

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Ray Optics